Let d be the remaining distance. Let t be the remaining time.
The standard distance equation is: d = rt
We are given the rate as 2, so: d = 2t
At the start of the walk, the remaining distance is 3 miles. The remaining time is 1.5 hours.
At the end of the walk, the remaining distance is 0 miles. The remaining time is 0 hours.
A graph of the distance and time would be a continuous, solid line. That's because the walker will be at every distance between 3 and 0 and every time between 1.5 and 0.
