Posted by Vivan on Saturday, February 2, 2013 at 3:46am.
so you have a slope of -2 and a point (1,5)
y = -2x + b
plug in the point
5 = -2(1) + b
b = 7
y = -2x + 7
or
y-5 = -2(x-1)
y-5 = -2x + 2
y = -2x +7
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