<PRE><B>Question 622794</B>
Find the average rate of change for the function between the given values.

f(x)=x^2+4x; from 4 to 9

I come up with 13 but not sure if thats right
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f(9) = 81 + 36 = 117
f(4) = 16 + 16 = 32
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Avg = (f(9) - f(4))/(9 - 4) = (117 - 32)/5
= 17
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