INTERMEDIATE ALGEBRA CLASS NOTES Relations Section 7.3

Section 7.3 Introduction to Relations Chapter 7: Introduction to Relations and Functions Section 7.3 Introduction to Relations Let’s work Exercise #19 from Section 5.1

Section 7.3 Exercise #7 Chapter 7: Introduction to Relations and Functions Section 7.3 Exercise #7 Let’s work Exercise #19 from Section 5.1

Write the relation as a set of ordered pairs. B C D E 1 2 3 4 5

Section 7.3 Exercise #11 Chapter 7: Introduction to Relations and Functions Section 7.3 Exercise #11 Let’s work Exercise #19 from Section 5.1

List the domain and range. B C D E 1 2 3 4 5

Section 7.3 Exercise #23 Chapter 7: Introduction to Relations and Functions Section 7.3 Exercise #23 Let’s work Exercise #19 from Section 5.1

Find the domain and range of the relations Find the domain and range of the relations. Use interval notation where appropriate.

Section 7.3 Exercise #35 Chapter 7: Introduction to Relations and Functions Section 7.3 Exercise #35 Let’s work Exercise #19 from Section 5.1

(Source: Centers for Disease Control) The percentage of male high school students, y, who participated in an organized physical activity for the year 1995 is approximated by y = –12.64x + 195.22. For this model, x represents the grade level (Source: Centers for Disease Control)

The percentage of male high school students, y, who participated in an organized physical activity for the year 1995 is approximated by y = –12.64x + 195.22. For this model, x represents the grade level Approximate the percentage of males who participated in organized physical activity for grades 9, 10, 11, and 12, respectively.

Grade 9, x = 9:

Grade 10, x = 10:

Grade 11, x = 11:

Grade 12, x = 12:

The percentage of male high school students, y, who participated in an organized physical activity for the year 1995 is approximated by y = –12.64x + 195.22. For this model, x represents the grade level b. Can we use this model to predict seventh-grade participation? Explain your answer.

Section 7.3 Exercise #41 Chapter 7: Introduction to Relations and Functions Section 7.3 Exercise #41 Let’s work Exercise #19 from Section 5.1