Interpreting Function Notation

The height of water in a bathtub, w , is a function of time, t . Let P represent this function.

Which statement in function notation matches this description: After 20 minutes, the bathtub is empty.

• P (0) = 0

• P (4) = 10

• P (10) = 4

• P (20) = 0

The height of water in a bathtub, w , is a function of time, t . Let P represent this function.

Which statement in function notation matches this description: The bathtub starts out with no water.

• P (0) = 0

• P (4) = 10

• P (10) = 4

• P (20) = 0

The height of water in a bathtub, w , is a function of time, t . Let P represent this function.

Which statement in function notation matches this description: After 10 minutes, the height of the water is 4 inches.

• P (0) = 0

• P (4) = 10

• P (10) = 4

• P (20) = 0

The height of water in a bathtub, w , is a function of time, t . Let P represent this function.

Which statement in function notation matches this description: The height of the water is 10 inches after 4 minutes.

• P (0) = 0

• P (4) = 10

• P (10) = 4

• P (20) = 0

Function C gives the cost, in dollars, of buying n apples. Which equation matches this situation?

1. Five apples cost $4.50.

• C (5) = 4.50

• C (4.5) = 5

Function C gives the cost, in dollars, of buying n apples. Which expression matches this situation?

1. The cost of 2 apples

• C (2)

• C (n) = 2

The relationship between the amount of time a car is parked, in hours, and the cost of parking, in dollars, can be described with a function. Cost is the _______________.

• independent variable

• dependent variable

The relationship between the amount of time a car is parked, in hours, and the cost of parking, in dollars, can be described with a function. Time is the _______________.

• independent variable

• dependent variable

The relationship between the amount of time a car is parked, in hours, and the cost of parking, in dollars, can be described with a function. C (3) = 9 means that...

• The cost is $3 for 9 hours.

• The cost is $9 for 3 hours.

The relationship between the amount of time a car is parked, in hours, and the cost of parking, in dollars, can be described with a function. Which statement(s) are true?

• C (0) = 0

• C (4) = C (8)

• C (4) > C (2)

• C (4) = 10