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Table of Contents

Preface

 

Chapter 1: Function Sense

 

Cluster 1: Modeling with Functions

 

Activity 1.1: Parking Problems

Objectives:

1. Distinguish between input and output.

2. Define a function.

3. Represent a function numerically and graphically.

4. Write a function using function notation.

 

Activity 1.2: Fill 'er Up

Objectives:

1. Determine the equation (symbolic representation) that defines a function.

2. Write the equation to define a function.

3. Determine the domain and range of a function.

4. Identify the independent and the dependent variables of a function.

 

Activity 1.3: Stopping Short

Objectives:

1. Use a function as a mathematical model.

2. Determine when a function is increasing, decreasing, or constant.

3. Use the vertical line test to determine if a graph represents a function.

 

Project Activity 1.4: Graphs Tell Stories

Objectives:

1. Describe in words what a graph tells you about a given situation.

2. Sketch a graph that best represents the situation described in words.

 

What Have I Learned?

How Can I Practice?

 

Cluster 2: Linear Functions

 

Activity 1.5: Walking for Fitness

Objective:

1. Determine the average rate of change.

 

Activity 1.6: Depreciation

Objectives:

1. Interpret slope as an average rate of change.

2. Use the formula to determine slope.

3. Discover the practical meaning of vertical and horizontal intercepts.

4. Develop the slope-intercept form of an equation of a line.

5. Use the slope-intercept formula to determine vertical and horizontal intercepts.

 

Activity 1.7: A New Computer

Objectives:

1. Write a linear equation in the slope-intercept form, given the initial value and the rate of change.

2. Write a linear equation given two points, one of which is the vertical intercept.

3. Use the point-slope form to write a linear equation given two points, neither of which is the vertical intercept.

4. Compare slopes of parallel lines.

 

Activity 1.8: Skateboard Heaven

Objectives:

1. Write an equation of a line in standard form Ax + By = C.

2. Write the slope-intercept form of a linear equation given the standard form.

 

Activity 1.9: College Tuition

Objectives:

1. Determine a line of best fit with a straightedge.

2. Determine the equation of a regression line using a graphing calculator.

3. Use the regression equation to interpolate and extrapolate.

 

What Have I Learned?

How Can I Practice?

 

Cluster 3: Systems of Linear Equations, Inequalities, and Absolute Value Functions

 

Activity 1.10: Ride for Less

Objectives:

1. Solve a system of 2 x 2 linear equations numerically and graphically.

2. Solve a system of 2 x 2 linear equations using the substitution method.

3. Solve an equation of the form ax + b = cx + d for x.

 

Activity 1.11: Healthy Lifestyle

Objectives:

1. Solve a 2 x 2 linear system algebraically using the substitution method and the addition method.

2. Solve equations containing parentheses.

 

Activity 1.12: Sam's Café

Objective:

1. Solve a 3 x 3 linear system of equations.

 

Activity 1.13: How Long Can You Live?

Objectives:

1. Solve linear inequalities numerically and graphically.

2. Use properties of inequalities to solve linear inequalities algebraically.

3. Solve compound inequalities algebraically and graphically.

 

Activity 1.14: Long Distance by Phone

Objectives:

1. Graph a piecewise linear function.

2. Write a piecewise linear function to represent a given situation.

3. Graph a function defined by y = | x - c|.

 

Activity 1.15: How Much Can You Tolerate?

Objectives:

1. Write a compound inequality to represent a given statement.

2. Determine the error.

3. Solve an equation involving absolute value using a number line.

4. Solve an inequality involving absolute value using a number line.

5. Solve absolute value equations and inequalities using a graphing approach.

6. Interpret absolute value as distance.

7. Graph an absolute value function.

 

What Have I Learned?

How Can I Practice?

Chapter 1 Summary

Chapter 1 Gateway Review

 

Chapter 2: The Algebra of Functions

 

Cluster 1: Addition, Subtraction, and Multiplication of Polynomial Functions

 

Activity 2.1: Spending and Earning Money

Objectives:

1. Identify a polynomial expression.

2. Identify a polynomial function.

3. Add and subtract polynomial expressions.

4. Add and subtract polynomial functions.

 

Project Activity 2.2: Viewing the Algebra of Functions

Objective:

1. Explore adding and subtracting functions graphically.

 

Activity 2.3: How Does Your Garden Grow?

Objectives:

1. Multiply two binomials using the FOIL method.

2. Multiply two polynomial functions.

3. Apply the property of exponents to multiply powers having the same base.

 

Activity 2.4: Stargazing

Objectives:

1. Convert scientific notation to decimal notation.

2. Convert decimal notation to scientific notation.

3. Apply the property of exponents to divide powers having the same base.

4. Apply the property of exponents a0 = 1, where a does not equal 0.

5. Apply the property of exponents a-n = 1/an where a does not equal 0 and n is any real number.

 

What Have I Learned?

How Can I Practice?

 

Cluster 2: Composition and Inverses of Functions

 

Activity 2.5: Inflated Balloons

Objectives:

1. Determine the composition of two functions.

2. Explore the relationship between f(g(x)) and g(f(x)).

 

Activity 2.6: Finding a Bargain

Objective:

1. Solve problems using the composition of functions.

 

Activity 2.7: The Square of a Cube

Objectives:

1. Apply the property of exponents to simplify an expression involving a power to a power.

2. Apply the property of exponents to expand the power of a product.

3. Determine the nth root of a real number.

4. Write a radical as a power having a rational exponent and write a rational exponent base to a as a radical.

 

Activity 2.8: Study Time

Objectives:

1. Determine the inverse of a function represented by a table of values.

2. Use the notation f-1 to represent an inverse function.

3. Use the property f(f-1(x)) = f-1(f(x)) = x to recognize inverse functions.

4. Determine the domain and range of a function and its inverse.

 

Activity 2.9: Temperature Conversions

Objectives:

1. Determine the equation of the inverse of a function represented by an equation.

2. Describe the relationship between the graphs of inverse functions.

3. Determine the graph of the inverse of a function represented by a graph.

4. Use the graphing calculator to produce graphs of an inverse function.

 

What Have I Learned?

How Can I Practice?

Chapter 2 Summary

Chapter 2 Gateway Review

 

Chapter 3: Exponential and Logarithmic Functions

 

Cluster 1: Exponential Functions

 

Activity 3.1: The Summer Job

Objectives:

1. Determine the growth or decay factor of an exponential function.

2. Identify the properties of the graph of an exponential function defined by y = bx, where b > 0 and b does not equal 1.

3. Graph an exponential function.

 

Activity 3.2: Cellular Phones

Objectives:

1. Determine the growth and decay factor for an exponential function represented by a table of values or an equation.

2. Graph exponential functions defined by y = abx where b > 0 and b does not equal 1, a does not equal 0.

3. Determine the doubling and halving time.

 

Activity 3.3: Population Growth

Objectives:

1. Determine annual growth or decay factor of an exponential function represented by a table of values or an equation.

2. Graph an exponential function by having equation y = a(1 + r)x, a does not equal 0.

 

Project Activity 3.4: Photocopying Machines

Objectives:

1. Generate data given the growth or decay rate of an exponential function.

2. Write exponential functions given the growth or decay rate.

3. Graph exponential functions from data.

4. Determine doubling and halving times from exponential functions.

 

Activity 3.5: Compound Interest

Objective:

1. Apply the compound interest and continuous compounding formulas to a given situation.

 

Activity 3.6: Continuous Growth and Decay

Objectives:

1. Discover the relationship between the equations of exponential functions defined by y = abt and the equations of continuous growth and decay exponential functions defined by y = aekt.

2. Solve problems involving continuous growth and decay models.

3. Graph base e exponential functions.

 

Activity 3.7: Bird Flu

Objectives:

1. Determine the regression equation of an exponential function that best fits the given data.

2. Make predictions using an exponential regression equation.

3. Determine whether a linear or exponential model best fits the data.

 

What Have I Learned?

How Can I Practice?

 

Cluster 2: Logarithmic Functions

 

Activity 3.8: The Diameter of Spheres

Objectives:

1. Define logarithm.

2. Write an exponential statement in logarithmic form.

3. Write a logarithmic statement in exponential form.

4. Determine log and ln values using the calculator.

 

Activity 3.9: Walking Speed of Pedestrians

Objectives:

1. Determine the inverse of the exponential function.

2. Identify the properties of the graph of a logarithmic function.

3. Graph the natural logarithmic function.

 

Activity 3.10: Walking Speed of Pedestrians, continued

Objectives:

1. Compare the average rate of change of increasing logarithmic, linear, and exponential functions.

2. Determine the regression equation of a natural logarithmic function that best fits a set of data.

 

Activity 3.11: The Elastic Ball

Objectives:

1. Apply the log of a product property.

2. Apply the log of a quotient property.

3. Apply the log of a power property.

4. Discover change of base formula.

 

Activity 3.12: Prison Growth

Objective:

1. Solve exponential equations both graphically and algebraically.

 

Activity 3.13: Frequency and Pitch

Objective:

1. Solve logarithmic equations both graphically and algebraically.

 

What Have I Learned?

How Can I Practice?

Chapter 3 Summary

Chapter 3 Gateway Review

 

Chapter 4: Quadratic and Higher-Order Polynomial Functions

 

Cluster 1: Introduction to Quadratic Functions

 

Activity 4.1: Baseball and the Sears Tower

Objectives:

1. Identify functions of the form f(x) = ax2 + bx + c  as quadratic functions.

2. Explore the role of c as it relates to the graph of f(x) = ax2 + bx + c.

3. Explore the role of a as it relates to the graph of f(x) = ax2 + bx + c.

4. Explore the role of b as it relates to the graph of f(x) = ax2 + bx + c.

 

Activity 4.2: The Shot Put

Objectives:

1. Determine the vertex or turning point of a parabola.

2. Determine the axis of symmetry of a parabola.

3. Identify the domain and range.

4. Determine the vertical intercept of a parabola.

5. Determine the horizontal intercept(s) of a parabola graphically.

 

Activity 4.3: Per Capita Personal Income

Objectives:

1. Solve quadratic equations numerically.

2. Solve quadratic equations graphically.

3. Solve quadratic inequalities graphically.

 

Activity 4.4: Sir Isaac Newton

Objectives:

1. Factor expressions by removing the greatest common factor.

2. Factor trinomials using trial and error.

3. Use the zero-product principle to solve equations.

4. Solve quadratic equations by factoring.

 

Activity 4.5: Motorcycle Deaths

Objective:

1. Solve quadratic equations by the quadratic formula.

 

Activity 4.6: Air Quality in Atlanta

Objectives:

1. Determine quadratic regression models using the graphing calculator.

2. Solve problems using quadratic regression models.

 

What Have I Learned?

How Can I Practice?

 

Cluster 2: Complex Numbers and Problem Solving Using Quadratic Functions

 

Activity 4.7: Complex Numbers

Objectives:

1. Identify the imaginary unit i = the square root of -1.

2. Identify a complex number.

3. Determine the value of the discriminant b2 - 4ac.

4. Determine the types of solutions to a quadratic equation.

5. Solve a quadratic equation in the complex number system.

 

Activity 4.8: Airfare

Objectives:

1. Build a quadratic model as a product of linear models.

2. Analyze a model contextually.

 

Project Activity 4.9: Chemical-Waste Holding Region

Objective:

1. Solving problems using quadratic functions.

 

What Have I Learned?

How Can I Practice?

 

Cluster 3: Curve Fitting and Higher-Order Polynomial Functions

Activity 4.10: The Power of Power Functions

Objectives:

1. Identify a direct variation function.

2. Determine the constant of variation.

3. Identify the properties of graphs of power functions defined by y = kxn, where n is a positive integer, k does not equal 0.

 

Activity 4.11: Hot Air Balloon

Objectives:

1. Identify equations that define polynomial functions.

2. Determine the degree of a polynomial function.

3. Determine the intercepts of the graph of a polynomial function.

4. Identify the properties of the graphs of polynomial functions.

 

Activity 4.12: Stolen Bases

Objectives:

1. Determine the regression equation of a polynomial function that best fits the data.

2. Distinguish between a discrete function and a continuous function.

 

Project Activity 4.13: Finding the Maximum Volume

Objective:

1. Problem solving using polynomial functions.

 

What Have I Learned?

How Can I Practice?

Chapter 4 Summary

Chapter 4 Gateway Review

 

Chapter 5: Rational and Radical Functions

 

Cluster 1: Rational Functions

 

Activity 5.1: Speed Limits

Objectives:

1. Determine the domain and range of a function defined by y = k/x, k is a nonzero real number.

2. Determine the vertical and horizontal asymptotes of the graph of y = k/x.

3. Sketch a graph of functions of the form y = k/x.

4. Determine the properties of graphs having equation y = k/x.

 

Activity 5.2: Loudness of a Sound

Objectives:

1. Graph an inverse variation function defined by an equation of the form y = k/xn , where n is any positive integer and k is a nonzero real number.

2. Describe the properties of graphs having equation y = k/xn

3. Determine the constant of proportionality (also called the constant of variation).

 

Activity 5.3: Percent Markup

Objectives:

1. Determine the domain of a rational function defined by an equation of the form y = k/g(x), where k is a nonzero constant and g(x) is a first-degree polynomial.

2. Identify the vertical and horizontal asymptotes of y = k/g(x).

3. Sketch a graph of rational functions defined by y = k/g(x).

 

Activity 5.4: Blood-Alcohol Levels

Objectives:

1. Solve an equation involving a rational expression using an algebraic approach.

2. Solve an equation involving a rational expression using a graphing approach.

3. Determine horizontal asymptotes of the graph of y = f(x)/ g(x) where f(x) and g(x) are first-degree polynomials.

 

Activity 5.5: Traffic Flow

Objectives:

1. Determine the least common denominator (LCD) of two or more rational expressions.

2. Solve an equation involving rational expressions using an algebraic approach.

3. Solve a formula for a specific variable.

 

Activity 5.6: Electrical Circuits

Objectives:

1. Multiply and divide rational expressions.

2. Add and subtract rational expressions.

3. Simplify a complex fraction.

 

What Have I Learned?

How Can I Practice?

 

Cluster 2: Radical Functions

 

Activity 5.7: Hang Time

Objectives:

1. Determine the domain of a radical function defined by y = the square root of g(x) where g(x) is a polynomial.

2. Graph functions having equation y = the square root of g(x) and y = negative the square root of g(x).

3. Identify the properties of the graph of y = the square root of g(x) and y = negative the square root of g(x).

 

Activity 5.8: Falling Objects

Objective:

1. Solve an equation involving a radical expression using a graphical and algebraic approach.

 

Activity 5.9: Propane Tank

Objectives:

1. Determine the domain of a function defined by an equation of the form y = the nth root of g(x) where n is a positive integer and g(x) is a polynomial.

2. Graph y = the nth root of g(x).

3. Identify the properties of graphs of y = the nth root of g(x).

4. Solve radical equations that contain radical expressions with an index other than 2.

 

What Have I Learned?

How Can I Practice?

Chapter 5 Summary

Chapter 5 Gateway Review

 

Chapter 6: Introduction to the Trigonometric Functions

 

Cluster 1: Introducing the Sine, Cosine, and Tangent Functions

 

Activity 6.1: The Leaning Tower of Pisa

Objectives:

1. Identify the sides and corresponding angles of a right triangle.

2. Determine the length of the sides of similar right triangles using proportions.

3. Determine the sine, cosine, and tangent of an angle using a right triangle.

4. Determine the sine, cosine, and tangent of an acute angle by using the graphing calculator.

 

Activity 6.2: A Gasoline Problem

Objectives:

1. Identify complementary angles.

2. Demonstrate that the sine and cosine of complementary angles are equal.

 

Activity 6.3: The Sidewalks of New York

Objectives:

1. Determine the inverse tangent of a number.

2. Determine the inverse sine and cosine of a number using the graphing calculator.

3. Identify the domain and range of the inverse sine, cosine, and tangent functions.

 

Activity 6.4: Solving a Murder

Objective:

1. Determine the measure of all sides and all angles of a right triangle.

 

Project Activity 6.5: How Stable Is That Tower?

Objectives:

1. Solve problems using right-triangle trigonometry.

2. Solve optimization problems using right-triangle trigonometry with a graphing approach.

 

What Have I Learned?

How Can I Practice?

 

Cluster 2: Why Are the Trigonometric Functions Called Circular Functions?

 

Activity 6.6: Learn Trigonometry or Crash!

Objectives:

1. Determine the coordinates of points on a unit circle using sine and cosine functions.

2. Sketch a graph of y = sin x and y = cos x.

3. Identify the properties of the graphs of the sine and cosine functions.

 

Activity 6.7: It Won't Hertz

Objectives:

1. Convert between degree and radian measure.

2. Identify the period and frequency of a function defined by y = a sin (bx) or y = a cos (bx) using the graph.

 

Activity 6.8: Get in Shape

Objectives:

1. Determine the amplitude of the graph of y = a sin (bx) or y = a  cos (bx).

2. Determine the period of the graph of y = a sin (bx) or y = a cos (bx) using a formula.

 

Activity 6.9: The Carousel

Objective:

1. Determine the displacement of y = a sin (bx + c) and y = a cos (bx + c) using a formula.

 

Activity 6.10: Texas Temperatures

Objectives:

1. Determine the equation of a sine function that best fits the given data.

2. Make predictions using a sine regression equation.

 

Project Activity 6.11: Music and Harmony

Objectives:

1. Know the relationship between wavelength and frequency.

2. Determine the sine model for a given frequency.

 

What Have I Learned?

How Can I Practice?

Chapter 6 Summary

Chapter 6 Gateway Review

 

Appendixes

Appendix A: Concept Review

Appendix B: Trigonometry

Appendix C: The TI-83/TI-84 Plus Graphing Calculator

 

Selected Answers

Glossary

Index

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