Attachment:

Distance.JPG

Reid took 1 hour to cycle from his home to his college. The graph shows Reed’s distance from his college during That hour. Reid’s average speed for the last 15 minutes Of the hour was how many kifometers per hour greater Than his average speed for the first 45 minutes?

A. 3

B. 4

C. 5

D. 6

E. 7

There must be something wrong with the image: it's hard to identify which number corresponds to which mark on the graph.

Anyway the solution should be as follows: {average rate for the last 15 minutes}-{average rate for the first 45 minutes}={distance covered in the last 15 minutes}/(1/4)-{distance covered in the first 45 minutes}/(3/4).