# A.4.2 Practice Problems

- Author:
- Katie Akesson

The height of water in a bathtub, w, is a function of time, t. Let P represent this function. Height is measured in inches and time in minutes. Match each description with a statement in function notation. After 20 minutes, the bathtub is empty.

The bathtub starts out with no water.

After 10 minutes, the height of the water is 4 inches.

The height of the water is 10 inches after 4 minutes.