Mr. Gonzalez started 8 yards away from the motion detector, and 2
seconds later he was 4 yards away from the motion detector. The
graph below shows Mr. Gonzalez’s motion. What is the difference
between the rate of change over the interval [1, 2] and [2, 4]?
a. 2
b. -2
c. 1⁄2
d. -1⁄2
e. 0