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

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

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 = 3×2 – 5x + 6

x = y2 – 4

2x – y2 = y2 + 3x

Which relation is a function? 


25 = x2 + y2

y = 3×2 – 5x + 6

x = y2 – 4

2x – y2 = y2 + 3x

Which of the following graphs shows a function?


http://www.intervisualtechnology.us/data/1/15332/U3L7Q7A1.jpg

http://www.intervisualtechnology.us/data/1/15333/U3L7Q7A2.jpg

http://www.intervisualtechnology.us/data/1/15334/U3L7Q7A3.jpg

http://www.intervisualtechnology.us/data/1/15335/U3L7Q7A4.jpg

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) = 2×2 – x.


39

21

15

-15