First find the slope of the SUV function...slope=(134-67)/(2-1)=67
S=67t+b, uses any point to find the SUV's initial position...I'll use (1,67)
67=67(1)+b, b=0
So both the SUV and the truck start from the same position at a distance of zero.
The SUV travels at 67mph while the truck travels at only 55mph.