# Intro to functions practice questions (answers only, no need to show work)

**Question description**

Which of the following relations is not a function?

{(1, 3), (2, 3), (-1, 4), (-3, 3), (-2, 1)}

{(-2, 4), (-3, 4), (-5, 4), (-1, 4), (-6, 4)}

{(1, 0), (4, 2), (-3, 5), (1, 8), (2, 6)}

{(7, 2), (-7, 3), (1, 8), (6, 4), (-5, 2)}

What is the domain of the relation shown in the graph below?

{-3, -2, 1, 3}

{-4, -2, -1, 2, 4}

{-4, -3, -2, -1, 1, 2, 3, 4}

{-3, -2, -1, 2, 4}

What is the range of the relation shown in the graph below?

{-3, -2, 1, 3}

{-4, -2, -1, 2, 4}

{-4, -3, -2, -1, 1, 2, 3, 4}

{-4, -2, 1, 2, 4}

What is the domain of the relation shown below?

{Florida, California, New York, Ohio}

{3.2%, 5.3%, 6%, 7.3%, 10%}

{5.3%, 6%, 7.3%}

{California, Ohio}

What is the range of the relation shown below?

{Florida, California, New York, Ohio}

{3.2%, 5.3%, 6%, 7.3%, 10%}

{5.3%, 6%, 7.3%}

{California, Ohio}

Which relation is a function?

25 = x2 + y2

y = 3x2 - 5x + 6

x = y2 - 4

2x - y2 = y2 + 3x

Which relation is a function?

25 = x2 + y2

y = 3x2 - 5x + 6

x = y2 - 4

2x - y2 = y2 + 3x

Which of the following graphs shows a function?

Find f(-3) for the function f(x) = -4x - 8

4

-20

-4

-3

Find g(1) for the function g(x) = x3 + 3x - 2.

4

1

2

7

Find r(-3) for the function r(x) = 2x2 - x.

39

21

15

-15

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