Given the exponential function A(x) = P(1 + r)x, what value for r will make the function a decay function?

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  1. any value of r such that 0 < 1+r < 1 will work. That is,

    -1 < r < 0

    In other words, r is negative, but not by much. That is, (1+r) is a positive fraction, so as x increases, the value of A(x) gets smaller and smaller

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  3. I just took the test. The answer is -2.1

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  4. There is no -2.1
    The options are:
    r= 2.1
    r= -0.1
    r= 0
    r= 0.1

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  5. r=-2.1

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