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At 1:00 P.M., the water level in a pool is 13 inches .At 1:30 P.M. the water level is 18 inches .At 2:30 P.M. the water level is 28 inches . What is the constant rate of change ?

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hudadahbourmath

Answer:

Points ( 0, 13) , ( 30, 18) , ( 90 ,28)

Rate = y2-y1/x2-x1

Rate = 28-13 / 90-0 = 1/6 inches / Mins

Or

Rate = 18-13/30-0 = 1/6 inches / Mins

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