1. INTERMEDIATE ALGEBRA CLASS NOTES
Relations
Section 7.3

2. 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

3. 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

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

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

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

7. 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

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

9. 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

10. (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 For this
model, x represents the grade
level
(Source: Centers for Disease Control)

11. 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 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.

12. Grade 9, x = 9:

13. Grade 10, x = 10:

14. Grade 11, x = 11:

15. Grade 12, x = 12:

16. 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 For this
model, x represents the grade
level
b. Can we use this model to predict seventh-grade participation? Explain your answer.

17. 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