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15 January, 00:23

Let f (x) = x2+5x-8 .

What is the average rate of change from x = 2 to x = 6?

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  1. 15 January, 00:54
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    Just find the slope

    that is ((f (6) - f (2)) / (6-2)

    f (6) = 6^2+5 (6) - 8=36+30-8=58

    f (2) = 2^2+5 (2) - 8=4+10-8=6

    average is (f (6) - f (2)) / (6-2) = (58-6) / (4) = 52/4=13

    average rate of change is 13
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