Passage I
Five bicycle riders traveled during the same 35 sec time interval along a 1 km segment of a straight path. Point P was located at one end of the segment. D, measured in meters, was a rider's distance along the path from Point P at time t. Measurement of D began simultaneously for all riders at t = 0 sec.
Figure 1 is a graph of D versus t for Riders 1 and 2. Figure 2 is a graph of D versus t for Riders 3, 4, and 5.
4. Based on Figure 1, the average speed of Rider 2 over the 35 sec interval was closest to which of the following?
Your Answer is
Correct Answer is H
Explanation
To find the average speed, use "total distance/total time". The riding distance of rider 2 is about 140 m, 140/35=4 m/s