What equation has the steepest graph?
a) y=3x+1
b) y=-7x+7
c) y=5x-2
d) y=1/2x+3

Michael gose to a theme park and rides two different roller coasters that both begin on a raised platform his height while on the first roller coaster measured in feet from the platform height can be modeled by the following graph where t is the number of seconds since the ride began