Answer:
a) C is the correct option.
b) rate = distance
time
t = 6s count the units.
d = 8 feet
rate = 4/3 feet/s
c) at 13 seconds. The rate to be zero that means the distance travelled is zero. From the graph, Terrence starts at 2 feet and maintains at 8 feet and decrease to 0 feet after 13 seconds. Therefore, the time for Terrence's rate to be 0 feet/s is at 13 s.
