Question 7

s(t)

7.  Olivia is walking her dog, Piggy, up and down the street.  The graph above represents her position, s(t), from her house for the first three hours of her walk.  At what times t does Olivia change direction?

a) t=1.8 and t=2.5
b) t=1.25 and t=2.8
c) t=0, t=1.8, t=2.5, and t=3
d) t=1.25, t=2.1, and t=2.8