D(t) Hannah walked 3.5 hours at an average rate of 3 miles per
hour. The function w(t) represents the distance Hannah walked
in t hours.
The graph to the right shows the distance d(t) Penelope walked
(in miles) as a function of time t (in hours).
7
Distance (mi)
a. How long did the girls walk? Justify your answer.

b. Who walked the furthest in 3.5 hours? Justify your
answer.
c. Who walked at a faster rate? Justify your answer.