Question

On the way to her babysitting job, Mary rode her bike for the first mile. She stopped at a traffic light and waited a few minutes for the traffic light to turn green. She then walked her bike across the street and up a short steep hill. Finally, she rode the bike at a constant speed for one more mile. If Mary created a graph of her time and distance, which statement describes the part of her graph that would show no change in distance?

A.Mary used her bike to ride the first mile.
B.Mary stopped and waited for the traffic light to turn green.
C.Mary walked her bike across the avenue and up a short hill.
D.Mary rode her bike at a constant speed for one mile.

Answer 1

The Answer you are looking for is B She stopped so there would be no rate in change for the graph

Answer 2

B. Mary stopped and waited for the traffic light to turn green.

Explanation:

Lets check the other options to see if distance changes:

A. Mary used her bike to ride the first mile. Definitely distance changes with time.

C. Mary walked her bike across the avenue and up a short hill. Here a short distance is covered with respect to time.

D. Mary rode her bike at a constant speed for one mile. As she is riding, so definitely the distance is changing.

Therefore, only option B is the point where there is no movement and no change in distance.