Practice!

Sample Problem

Your grandparents live 100 miles away from you. If your parents drive at an average rate of 30 mph, the distance from you to your grandparents’ house can be modeled by the equation d = 100 – 30h, where d is the distance from your grandparents’ house in miles and h is the number of hours you’ve been driving. Graph this function and see how far from your grandparents’ house you will be after 2 hours.

miles

Solution

Graph the equation d = 100 – 30h

After 2 hours of driving, you will be 40 miles away from your grandparents’ house.