Question

a car is stopped at a light. once the light changed, it starts moving at a constant speed. how long was the car stopped at the light? 90 sec 30 sec 45 sec 60 sec

Explanation:

Step1: Analyze the graph

When the car is stopped, the distance does not change.

Step2: Determine the time interval

The distance is constant from \(t = 0\) to \(t=30\) seconds. So the car was stopped for \(30\) seconds.

Answer:

30 sec