Introduction to Functions

What is the range of the following relation:
(9, -2) (4, 3)  ( 8, 10) ( -4, 8)

• -4, 4, 8, 9

• -2, 3, 8, 10

• (9, -2) ( 4, 3)

• (8, 10) (-4, 8)

For the function f(x) = -3x + 3 find f(0).

• 0

• -3

• 3

• -1

Evaluate f(-2) if f(x) = x²+ 3.

• -1

• 1

• 7

• -7

Solve for f(5):
f(5) = -x + 4

• 9 

• 1

• -1

• -9

What is the value of x in:

f(4) = 3x - 1

• 11

• 4

• -1

• 0

Which of these graphs represents a function?

• Z

• W

• X

• Y

Evaluate f(6) when f(x) = 2x + 4

• 16

• 17

• -8

• 21

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

Is this a function? Explain.

• Yes; it passes the horizontal line test.

• No; it is not a straight line.

• Yes; it passes the vertical line test.

• No; there is a line connecting the dots.

Find f(2)

• 5

• 4

• 3

• 0