### Home > PC > Chapter 2 > Lesson 2.3.1 > Problem2-73

2-73.

The domain is time elapsed, and Lew walks for one hour. The range is 4 miles per hour.

The units are miles since:

$\frac{\text{miles}}{\text{hour}}\cdot \text{hr}=\text{miles}$

Use the graph above to figure this out.