SOLUTION: >1. Find the average rate of change of f(x)=x^3-9x+9: a) from -8 to -2 b) from -1 to 1 c) from 1 to 4 a) what is averge rate of change of f (x) =x^3-9x+9 from -8 to -2?

Algebra ->  Functions -> SOLUTION: >1. Find the average rate of change of f(x)=x^3-9x+9: a) from -8 to -2 b) from -1 to 1 c) from 1 to 4 a) what is averge rate of change of f (x) =x^3-9x+9 from -8 to -2?       Log On


   

Question 752214: >1. Find the average rate of change of f(x)=x^3-9x+9:
a) from -8 to -2
b) from -1 to 1
c) from 1 to 4
a) what is averge rate of change of f (x) =x^3-9x+9 from -8 to -2?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
1. Find the average rate of change of
f(x)=x^3-9x+9:
a) from -8 to -2
ave rate = [f(-2)-f(-8)]/[-2-(-8)]
f(-2) = -8+18+9 = 19
f(-8) = -64+72+9 = 17
f(-2)-f(-8) = 2
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ave rate = 2/6 = 1/3
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Use the same procedure to find answers for b, and c.
Cheers,
Stan H.
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b) from -1 to 1
c) from 1 to 4