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orbie

Find the average rate of change of the function f over the given interval. f(x)=0.25x^4-x^2-9x+8 from x=-4 to x=3

  • 2 years ago
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  1. freckles
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    \[\frac{f(-4)-f(3)}{-4-3}\] Use this to find the slope of the secant line from x=-4 to x=3

    • 2 years ago
  2. orbie
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    I don't understand how you put that into the problem.

    • 2 years ago
  3. freckles
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    No you put the problem into that

    • 2 years ago
  4. freckles
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    Do you know how to find f(-4)?

    • 2 years ago
  5. orbie
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    Would you put it into the equation?

    • 2 years ago
  6. freckles
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    Replace the x's in your function with -4's

    • 2 years ago
  7. freckles
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    Then to evaluate f(3) Replace the x's in your function with 3's

    • 2 years ago
  8. orbie
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    So what I got is for f(-4)= 92 and f(3)= -7.75...is that right?

    • 2 years ago
  9. freckles
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    That is right ! :)

    • 2 years ago
  10. freckles
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    \[\frac{92-(-7.75)}{-4-3}\]

    • 2 years ago
  11. orbie
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    Ooooh wow I get it now! Thank you so much!

    • 2 years ago
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