Four brothers (andrew, brad, carl, and david) leave their parents' house at the same time and take the highway to their respective homes. the graph shows how long andrew, brad and carl drove and how far each had to travel on his highway to reach his home.
david drove 1.75 hours.
the distance he drove can be modeled by the equation d=40t where d = distance and t = time.
which brother traveled at the greatest speed?
a. andrew
b. brad
c. carl
d. david