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Math Help - Exponential function - regularly spaced points

  1. #1
    Member wiseguy's Avatar
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    Exponential function - regularly spaced points

    "An exponential function has f(8) = 13 and f(11) = 26. Find another value of f(x) using the pattern followed by regularly spaced points."

    I found the equation is 2.05*1.26^x using my calculator, however I'm not sure how to use this showing work... ?
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  2. #2
    Master Of Puppets
    pickslides's Avatar
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    I would suggest using the model y = A\times b^x or y= Ae^{bx}

    Either way substitute your two points in to solve A and b simultaneously.
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