Function Review

The temperatures in NYC were tracked in this graph.

What does the point (3, 50) represent?

• On the third day, it was 50 degrees F.

• It was only 3 degrees F on day 50.

• The temperature rose 3 degrees on day 50.

• None of these.

Russel's height is tracked in this graph. What does the point (12, 3) represent?

• Russel was 3 feet tall when he was 12 years old.

• Russel grew 3 inches when he was 12 years old.

• Russel grew 12 inches when he was 3 years old.

• Russel grew 12 inches over 3 years.

If g(x)=2x+5, what is the value of g(4)?

Evaluate f(2):

f(x)=3x+1

• 7

• 9

• 11

• 13

• 12

• 4.5

• 3

• 0

Function w gives the weight of a cat, in kilograms, when it is m months old. Which statement represents the meaning of the equation w(7) = 4 in this situation?

• The cat weighs 7 kilograms when it is 4 months old.

• The cat weighs 4 kilograms when it is 7 months old.

• The weight of the cat has been 7 kilograms for 4 months.

• The cat weighs 4 kilograms when it is 7 years old.

Function d gives the distance of a boat from the dock t seconds after leaving the dock. Distance is measured in meters. Here is a graph that represents d. Select all statements in function notation that represent the situation.

• d(0) = 170

• d(30) = d(70)

• d(t) = 10 when t is 20

• d(170) = 0

• d(0) = 0

List the types of intervals that the graph demonstrates in order.

• decreasing, constant, increasing, constant
• increasing, decreasing, constant
• increasing, constant, increasing, constant
• increasing, constant, decreasing, constant

Over which interval of time is this person returning home?

• A

• B

• C

• D

• E

How long did it take Sam to get to school?

• 5 minutes
• 20 minutes
• 1.25 km
• 1.25 minutes