Question

look at this graph of a joggers speed. how can you explain the movement of the line? the jogger speeds up and slows down during the time period. once twice

Explanation:

Step1: Analyze speed - graph

In the speed - graph, the speed first increases from 0 to a peak value, then decreases to a lower value, then increases again to another peak value and finally decreases.

Step2: Count speed - change intervals

There are two intervals where the jogger speeds up and two intervals where the jogger slows down. So the jogger speeds up and slows down twice.

Answer:

twice