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Decimals in equation from trendline

  1. #1
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    Decimals in equation from trendline

    Does anyone know how to see more decimals in the equation derived from the trandline of thechart?
    For instance, I have an exponential chart with the following equation:
    y = 87.26e-0.00x

    i want to be able to see at least 4 decimals in order to know the real value of the constant (or multiplier) of x.

    I know it could be done with Excel 3 but I am working with Excel 7 and I can not find the way.

    thanks in advance

  2. #2
    Forum Expert shg's Avatar
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    Re: Decimals in equation from trendline

    Welcome to the forum.

    To see the m and b for the exponential y = exp(b)*exp(m*x), select a two-cell wide range (e.g., A1:B1), paste this in the formula bar,

    =LINEST(LN(y), x)

    ... and confirm with Ctrl+Shift+Enter rather than just Enter.

    Then m is in A1 and and b is in B1.
    Entia non sunt multiplicanda sine necessitate

  3. #3
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    Re: Decimals in equation from trendline

    Quote Originally Posted by shg View Post
    Welcome to the forum.

    To see the m and b for the exponential y = exp(b)*exp(m*x), select a two-cell wide range (e.g., A1:B1), paste this in the formula bar,

    =LINEST(LN(y), x)

    ... and confirm with Ctrl+Shift+Enter rather than just Enter.

    Then m is in A1 and and b is in B1.
    Thanks for your reply; unfortunatelly it did not work.
    I am attaching a file where you can see what i am talking about.
    Attached Files Attached Files

  4. #4
    Forum Expert shg's Avatar
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    Re: Decimals in equation from trendline

    Change X and Y in the formula to references to your data ...

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