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Suppose the slope intercept from is y = mx + c

Suppose you know the coordinates of some point P = (p,q) where p � 0 so that P is not the y-intercept,

then the equation of the line is (y-q) = m(x-p)

or y = mx + (-mp+q)

It is easy to see that if P were the y-intercept so that p = 0 and q = c, then this equation would become y = mx + (-m*0 + c) or y = mx + c as would be expected.

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Related Questions

Can you change point slope intercept form?

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