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anonymous

  • one year ago

What is the average rate of change from x = -4 to x = 1? -3 -1 0 1

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  1. anonymous
    • one year ago
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  2. freckles
    • one year ago
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    can you find the function value at x=-4?

  3. freckles
    • one year ago
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    we will also need to find the function value at x=1

  4. freckles
    • one year ago
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    |dw:1433531910745:dw| your graph looks kind of like this

  5. freckles
    • one year ago
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    |dw:1433532004730:dw| so you can you tell me the y values for both x=1 and x=-4?

  6. anonymous
    • one year ago
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    3 and -1?

  7. freckles
    • one year ago
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    yep

  8. freckles
    • one year ago
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    enter in and evaluate \[\frac{y_2-y_1}{x_2-x_1}\]

  9. freckles
    • one year ago
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    you are just finding the slope of the line going through (1,-1) and (-4,3)

  10. freckles
    • one year ago
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    |dw:1433532217203:dw|

  11. anonymous
    • one year ago
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    So the answer is -1

  12. freckles
    • one year ago
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    \[\frac{3-(-1)}{-4-1}\] hmm... what do you get when you do the numerator 3+1=? and the denomintor -(4+1)=?

  13. anonymous
    • one year ago
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    \[\frac{ 4 }{ 5}\]

  14. anonymous
    • one year ago
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    negative 5 sorry

  15. freckles
    • one year ago
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    don't forget the negative -(4+1)=-(5)=-5

  16. freckles
    • one year ago
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    yeah

  17. freckles
    • one year ago
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    you are done -4/5 is the average rate of change from x=-4 to x=1

  18. anonymous
    • one year ago
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    but thats not one of the answer choices

  19. freckles
    • one year ago
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    you can always divide 4 by 5 too

  20. anonymous
    • one year ago
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    i got 0.8

  21. freckles
    • one year ago
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    and attach the negative you had

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