# 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? a. 1/3 inch up per foot across b. 1/2 inch up per foot across c. 2 inches up per foot across d. 3 inches up per foot across

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