Intermediate Algebra (11th edition)

(Marvins-Underground-K-12) #1

31. 32.


188 CHAPTER 3 Graphs, Linear Equations, and Functions


x

y

0

3

–3

–4 4
x

y

0

2

3

Decide whether each relation defines a function, and give the domain and range. See Exam-
ples 1– 4.

































51 1, 1 2 , 1 1, - 12 , 1 0, 0 2 , 1 2, 4 2 , 1 2, - 426 51 2, 5 2 , 1 3, 7 2 , 1 4, 9 2 , 1 5, 11 26


51 - 3, 1 2 , 1 4, 1 2 , 1 - 2, 7 26 51 - 12, 5 2 , 1 - 10, 3 2 , 1 8, 3 26


51 2, 4 2 , 1 0, 2 2 , 1 2, 5 26 51 9, - 22 , 1 - 3, 5 2 , 1 9, 2 26


51 5, 1 2 , 1 3, 2 2 , 1 4, 9 2 , 1 7, 6 26 51 8, 0 2 , 1 5, 4 2 , 1 9, 3 2 , 1 3, 8 26


2
5
11
17
3

1
7
20

1
2
3
5

10
15
19
27


  1. xy 20. 21. 22.
    15
    12
    1
    1 - 4

    • 1




xy

0
4


  • 4 8

  • 4

  • 4

  • 4 - 4


xy
4
2
0


  • 2 - 3

    • 3

    • 3

    • 3




xy

1
3 - 6


  • 6

  • 1 - 6

  • 3 - 6


23. 24. 25.


x

y

0

(–2, 2)

(0, 3)
(3, 2)
x

y

0
(–1, –3) (1, –3)

(4, 0) x

y

0

2

2

x

y

0
–2

2
x

y

0

2

2
x

y

0

2

2

x

y

0
–3

4

x

y

0

4

–2 2

26. 27. 28.


29. 30.

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