Notes Functions

• all real numbers

• integers (negatives, 0, and positives)

• rational numbers (anything that can be a fraction)

• whole numbers (0 and above)

Evaluate f(-2) if f(x) = x+3

• -1

• 1

• 5

• -5

For the function f(x) = -3(x-1) find f(0).

• 0

• -3

• 3

• -1

Given f(x) =
2x² + 5x - 17, find f(-1). 

• f(-1) = -20

• f(-1) = -24

Given f(x) = -4x - 10 and f(x) = 10. Find x

• x = -5

• x = 5

• x = -50

• x = 30

What is x if
f(x) = -2?

• 4

• 0

• 3

• 8

What is f(8)? 

• 8

• 0

• 3

• -2

The function h(t) represents the height in inches of a plant after t weeks. What does the notation h(4) = 5 mean?

• After 5 week the plant is 4 inches tall

• The plant grows at a rate of 5/4 inch per week

• After 4 weeks the plant is 5 inches tall

• The plant grows at a rate of 1 inch per week

f(x) is the same thing as ______.

• y

• x

• input

• an equation

What is f(1)?

• 1

• 5

• 0

• 4