Functions Practice

If f(x) = 2x + 5, find f(-3).

• 1

• -1

• 4

• -4

If f(x) = 3x - 5, find f(4)

• -7

• 5

• -3

• 7

If f (x) = 6x + 7, find f (3).

• 10

• -11

• -10

• -1

What is the value of f(0)?

• -2
• 2
• 4
• 0

What is f(2)?

• -4
• 8
• 0
• 5

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

• Function
• Not a Function

Evaluate f(x) = x² for f(-8)

• 64
• -64
• -16
• 16