Intermediate Algebra (11th edition)

Graph each inequality or compound inequality.

18. 
    
    
    
    19. and
        20.Which one of the following is the graph of a function?
        A. B. C. D.
    
    
    
    

3 x- 2 y 76 y 62 x- 1 x-y 63

206 CHAPTER 3 Graphs, Linear Equations, and Functions

21.Which of the following does not define yas a function of x?

A. 51 0, 1 2 , 1 - 2, 3 2 , 1 4, 8 26 B.y= 2 x- 6 C.y= 2 x+ 2 D.

Give the domain and range of the relation shown in each of the following.

22.Choice A of Exercise 20 23.Choice A of Exercise 21

24.For , find(a) , and (b)

25.Graph the linear function defined by ƒ 1 x 2 =^23 x- 1. What is its domain and range?

ƒ 1 x 2 =-x^2 + 2 x- 1 ƒ 112 ƒ 1 a 2.

y

0 x

y

x

0

y

x

0

y

0 x

xy

01

32

02

63

CUMULATIVE REVIEW EXERCISES

CHAPTERS 1–3

Decide whether each statement isalways true, sometimes true, ornever true. If the statement

issometimes true, give examples in which it is true and in which it is false.

1.The absolute value of a negative number equals the additive inverse of the number.

2.The sum of two negative numbers is positive.

3.The sum of a positive number and a negative number is 0.

Perform each operation.

Simplify.

10.Write in interval notation.

Evaluate each expression for ,,and.

Solve.

3 x- 1

5

+

x+ 2

2

=-

3

10

2 z- 5 + 3 z= 2 - z

2 r

8 p+ 2 r

• 312 q- 3 p 2

p=- 4 q=^12 r= 16

• 36 x... 5

142 - 42 - 1 - 127

4 + 1 - 62

• 1 - 4 m+ 32 3 x^2 - 4 x+ 4 + 9 x-x^2

- |- 2 |- 4 +|- 3 |+ 7 1 - 0.8 22 2 - 64