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Math Help - Find the Inverse of the Function

  1. #1
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    Find the Inverse of the Function

    Find the inverse of the function f(x) = mx + b, where m cannot equal 0.
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  2. #2
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    Quote Originally Posted by magentarita View Post
    Find the inverse of the function f(x) = mx + b, where m cannot equal 0.
    Let y=mx+b

    Rearrange to make x the subject, so you will get:

    x = \frac{y-b}{m}

    This is your inverse. Remember to change it back to correct format, which is:

    f'(x) = \frac{x-b}{m}
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  3. #3
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    That easy???

    I should have tried harder. The question is all too easy.

    Thanks Air.

    Rita
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  4. #4
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    Rule of thumb

    I always use a simple trick to remember inverse functions, especially with linear equations:

    A function's slope times the inverse of that functions slope equals -1
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  5. #5
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    rman144

    Thanks for Rule of Thumb.
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