Question 153478
Given the function f(x) = - 4x find the  AVERAGE RATE of CHANGE  of  f from  -4 to 1
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Average = [f(1)-f(-4)]/[1--4]
Average = [-4 - 16] / [1+4] = -20/5 = -4
Notice that the answer is the slope of y = -4x
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Cheers,
Stan H.