During summer break, Jamie's family went camping in the mountains. There were no roads to their camp, 8 miles away, and it took them about 4.5 hours to reach the campsite on foot. Did Jamie's family stop to rest during the trip? How can you tell from the data?
A) No. They continued moving but their speed varied.
B) Yes. After 1.5 hours, there is no change in position for 30 minutes.
C) No. They continued moving, although they also slowed down continuously during the trip.
D) Not really. They did stop, but that was only when they reached the campsite at distance equals 0.

Using the information on the graph, we can infer that Jamie's family stop to rest after 1.5 hours as there was no change in position for 30 minutes.

From the Distance - time graph :

At time 1.5 hours on the horizontal axis, there is no change in the distance traveled as the distance stayed at 5 miles.

The distance stayed at 5 miles between 1.5 - 2.0 hours, which means that there was no movement for (2.0 - 1.5 = 0.5 hours).

Therefore, using the data, Jamie's family stopped for 30 Minutes after 1.5 hours.

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