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Math Help - Linear Law

  1. #1
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    Linear Law

    I have plotted a Linear graph, using P1 and P2. I now need to determin by calculation the "Law of the line".
    P1 (-2, -6.2) and P2 ( 3, 4.8)

    Can anyone help?
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  2. #2
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    Re: Linear Law

    Quote Originally Posted by peugeotgtidanny View Post
    I have plotted a Linear graph, using P1 and P2. I now need to determin by calculation the "Law of the line".
    P1 (-2, -6.2) and P2 ( 3, 4.8) Can anyone help?
    Can you tell what the heck Law of the line could possibly be?
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  3. #3
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    Re: Linear Law

    I think its:
    Gradient = y divided by x
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    Re: Linear Law

    Quote Originally Posted by peugeotgtidanny View Post
    I think its:
    Gradient = y divided by x

    Given the points (x_1,y_1)~\&~(x_2,y_2) the line determined is

    (y-y_1)=\left(\frac{y_2-y_1}{x_2-x_1}\right)(x-x_1) if x_2-x_1\ne 0
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  5. #5
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    Re: Linear Law

    That is normally referred to as the "slope" of the line.
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