Acar enters an interstate highway 15 mi north of a city. the car travels north at an average speed of 62.5 mph. which equation models the car’s distance d from the city after traveling for h hours?

D(x)=62.5x+15  x is how far he goes when he travels 62.5 miles per hour.  Since he is already 15 miles north of the city we add that in as our "starting" distance.  On a graph, this would be the y-intercept and the speed would serve as the slope.  This is given as a linear relationship.

91=24+35+4d
91=59+4d
4d=32
therefore d=8

Therefore, each shirt costs $8