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Math Help - i need to generate a formula

  1. #1
    Newbie
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    Feb 2011
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    i need to generate a formula

    should be basic, here's my challenge:
    I need formula to calulate a descending value when a know value is entered eg:

    input output
    1.40 = 27.07
    1.41 = 27.06
    1.42 = 27.05
    1.43 = 27.04
    and on and on

    In other words the known(input) value increase in .01 increments, then the output value decreases by .01.
    What's the formula that may be applied for this?
    Thanks and kudos to whomever can help with this.
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  2. #2
    MHF Contributor
    Joined
    Mar 2010
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    Florida
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    Quote Originally Posted by Gabor1972 View Post
    should be basic, here's my challenge:
    I need formula to calulate a descending value when a know value is entered eg:

    input output
    1.40 = 27.07
    1.41 = 27.06
    1.42 = 27.05
    1.43 = 27.04
    and on and on

    In other words the known(input) value increase in .01 increments, then the output value decreases by .01.
    What's the formula that may be applied for this?
    Thanks and kudos to whomever can help with this.
    \displaystyle m=\frac{y-y_1}{x-x_1}=\frac{27.07-27.06}{1.4-1.41}=\frac{.01}{-.01}=-1

    y-y_1=m(x-x_1)
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