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Line equation

  1. Dec 6, 2014 #1

    Rectifier

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    The problem

    Find k and m.

    ## f(x) = kx+m ##

    ## f(3x-2)=6x-5 ##

    The attempt

    ## t = 3x - 2 ##

    ## f(t) = kt + m \\ f(3x -2) = 2(3x-2) - 1 \\ f(t) = 2t - 1 \\ f(t) = kt + m \\ k=2 \\ m=-1 ##

    I am not sure if I am doing this right...
     
  2. jcsd
  3. Dec 6, 2014 #2
    You can numerically test your work. Do it.

    Checking your work numerically (when possible) is a good way to check your calculations even if you think you are doing it right.
     
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