Question

You start 80 miles east of pittsburgh and drive east at a constant speed of 65 miles per hour. (assume that the road is straight and permits you to do this.) find a formula for dd, your distance from pittsburgh, as a function of tt, the number of hours of travel.

Answer 1

We get 65 miles away from Pittsburgh each hour, but we also started 80 miles away. Thus, our formula for dd is dd = 65tt + 80