KJ4UTS
  • KJ4UTS
Determine the average rate of change of the function f(x)=-2x^2+5 over the interval from x=1 to x=4. My choices are: -10 10 -8 8 None of the others
Mathematics
schrodinger
  • schrodinger
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KJ4UTS
  • KJ4UTS
Do I plug this in like this: -2(1)^2+5=3 -2(4)^2+5=-27
anonymous
  • anonymous
yes that's a start. You found f(1) = 3 and f(4) = -27. So now you do \[\frac{ -27-3 }{ 4-1 }\]because the equation is\[avg~rate~of~change=\frac{ f(b)-f(a) }{ b-a }\]
KJ4UTS
  • KJ4UTS
oh ok I got -10 thank you for explain that with the formula.

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anonymous
  • anonymous
yeah that's right. you're welcome

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