05-11-2019
Mathematics

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9. Calculate the average rate of change of f(x) = -2x² + 4x -5 on the interval (-6, 4).

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keissingerkurt keissingerkurt

05-11-2019

-2(-6)^2+4(-6)-5 - [-2(4)^2+4(4)-5 / -6-4

= -101+21 / -10

= -80/-8

= 8

Rate of change is same as gradient or slope

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