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Given a point P(a,b) and slope m, the point slope equation is (y - b)/(x - a) = m
If the point is x=a, y=b ie the point (a,b) , then your line is y-b=m(x-a) where m is the gradient (anything you like).
You a goofy shoty B.
Given a point P = (a,b) and slope m, the equation of a line through P with slope m is (y-b) = m(x-a)
If the point is (a, b), and the desired slope is m, the equation is:y - b = m(x - a) If the slope is not given, you can make up any slope. If you add "b" on both sides, you would get: y = m(x-a) + b