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22 February, 07:08

Find average rate of change for the function f (x) = 2x^2+1 from x=-3 to x=4

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Answers (2)
  1. 22 February, 08:36
    0
    Plug in - 3

    f (-3) = 2 (-3) ^2 + 1

    f (-3) = 19

    f (4) = 2 (4) ^2 + 1

    f (4) = 33

    or can we just take the derivative and plug it in?

    f' (-3) = 4 (-3) = - 12

    f' (4) = 4 (4) = 16
  2. 22 February, 09:08
    0
    Plug teach x into the equation to get a y value then use these values as an ordered pair in the slope formula.

    (-3, 19) (4,33)

    m = (33-19) / (4 - - 3)

    m = 14/7

    m = 2
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