Posted by Sarah on Friday, June 15, 2012 at 12:14am.
y' = slope = m = 4 x
where x = -2, m = 4(-2) = -8
y = -8 x + b
at x = -2, y = 2(4) - 1 = 7
so
7 = -8(-2) + b
7 = 16 + b
b = - 9
so
y = -8 x - 9
thank you
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