Posted by Olivia on Monday, March 11, 2013 at 1:35am.
F(x) = -2x^2 + 6x.
F(1) = -2*1^2 + 6*1 = -2 + 6 = 4.
F(3) = -2*3^2 + 6*3 = -18 + 18 = 0.
F(3)-F(1) = 0 - 4 = -4 = Average rate of change.
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