Function Notation and Evaluating a Function Given the Graph

For what value of x does f(x) = -2?

• 0

• -5

• 3

• -3

Evaluate the function for the given value:

• 24

• 3

• 80

• 15

Evaluate the function for the given value:

• -2

• 70

• 48

• 96

What is the value of x when f(x) = 16?

• x = 4 only

• x = 4 and x = 8

• x = 16

• Not on the graph

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

For what value of x does f(x) = 4?

• 0

• -5

• 3

• -3

The function R represents the rain total rainfall, in cm, after x hours. The graph of the function is shown. Interpret the meaning of R (1.5) = 3

• After 1.5 hours, 3 cm of rain has fallen.

• After 3 hours, 1.5 cm of rain has fallen.

• After 1.5 hours, 1.5 cm of rain has fallen.

• After 3 hours, 3 cm of rain has fallen.

• Function, because every input has ONE output

• Not a Function, because some inputs have MORE THAN ONE output

Is this mapping a function or not a function? 

• Function

• Not a Function

Lee charges $3 for a basket and $2.50 for each pound of fruit picked at the orchard. Write a function for the total cost of x pounds of fruit from the orchard.

• f(x) = 3x + 2.5

• f(x) = 2.50x + 3

• f(x) = 2.50x 

• f(x) = 3x + 2.50