Posted by Butch on Sunday, July 24, 2011 at 1:26pm.
A(-3,-3), M(x,y), B(5,6).
x = (-3+5) / 2 = 1.
y = (-3+6) / 2 = 1 1/2 = 3/2.
The slope of a straight line is the same at all points on the line.
m = (6-(-3)) / (5-(-3)) = 9/8.
m2 = -8/9 = Negative reciprocal of m.
(1,3/2),(x,y),
m2 = (y-3/2) / (x-1) = -8/9,
Cross multiply:
y-3/2 = -8/9(x-1).
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