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19 May, 20:09

Let f (x) = x^2-4

What is the average rate of change of f (x) from - 5 to - 2?

A. - 7

B. - 1/7

C. 7

D. 1/7

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Answers (1)
  1. 19 May, 20:17
    0
    A. - 7.

    Step-by-step explanation:

    f (-5) = (-5) ^2 - 4 = 21.

    f (-2) = (-2) ^2 - 4 = 0.

    Average rate of change = [ f (-2) - f (-5) ] / (-2 - (-5))

    = (0 - 21) / 3

    = - 7.
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