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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Originally Posted by peugeotgtidanny 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?
I think its: Gradient = y divided by x
Originally Posted by peugeotgtidanny I think its: Gradient = y divided by x Given the points $\displaystyle (x_1,y_1)~\&~(x_2,y_2)$ the line determined is $\displaystyle (y-y_1)=\left(\frac{y_2-y_1}{x_2-x_1}\right)(x-x_1)$ if $\displaystyle x_2-x_1\ne 0$
That is normally referred to as the "slope" of the line.
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