A ramp with a constant incline is made to connect a driveway to a front door. At a point 4 feet from the driveway, the height of
the ramp is 12 inches. At a point 6 feet from the driveway, the height of the ramp is 18 inches. What is the rate of change of the ramp’s incline? inch up per foot across
inch up per foot across
2 inches up per foot across
3 inches up per foot across
