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

Answer 1

The part of Mary's graph that would show no change in distance corresponds to the time she spent waiting at the traffic light. Therefore, the correct statement is:

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

During this time, although time is passing, her distance remains constant, resulting in a horizontal line on the graph.