Question

what is happening in the graph between 30 and 40 minutes? sarah is accelerating sarah is travelling at a constant speed sarah is slowing down sarah is not moving

Explanation:

Step1: Analyze graph slope

In a distance - time graph, slope represents speed.

Step2: Check slope between 30 - 40 minutes

The graph is horizontal in this time interval. A horizontal line has a slope of 0.

Step3: Determine motion

Since slope (speed) is 0, Sarah is not moving.

Answer:

D. Sarah is not moving