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13 March, 02:19

Determine whether the function is growth or decay AND its percentage of growth or decay.

y=7 (.4) ^x

+4
Answers (2)
  1. 13 March, 04:27
    0
    Decay, 60%

    Step-by-step explanation:

    Decay because 0.4 < 1

    7 (.4) ¹ = 2.8

    %: 2.8/7 * 100 = 40%

    Decrease of 60%
  2. 13 March, 05:27
    0
    decay 60%

    Step-by-step explanation:

    y=7 (.4) ^x

    The equation is of the form

    y = a b^x

    b tells us growth or decay

    b>1 growth

    b<1 decay

    This is decay

    To find the percent decay take 1-b

    1-.4 =.6

    Change this to percent

    60%
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