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anonymous

  • one year ago

Use the graph below for this question: graph of parabola going through negative 1, 5 and negative 2, 7. What is the average rate of change from x = −1 to x = −2? 2 −2 4 −1

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  1. anonymous
    • one year ago
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    HELPPPPp!!!!!!!!!!

  2. ZeHanz
    • one year ago
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    Imagine what happens if you go from x = -1 to x = -2: At x = -1 you are at height 5, at x = -2 you are at height 7.

  3. anonymous
    • one year ago
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    2

  4. ZeHanz
    • one year ago
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    True, and because you move only one unit (to the left) the average rate of change would also be 2. But: rate of change is measured going from left to right. The question should have been (imo) what is the average rate of change between x=-2 to x=-1. It is -2.

  5. anonymous
    • one year ago
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    That you so much you really are a life saver!!!

  6. ZeHanz
    • one year ago
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    If you like to use a formula: avg rate of change = delta y / delta x, So: \(\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{7-5}{(-2)-(-1)}=\dfrac{2}{-1}=-2\)

  7. ZeHanz
    • one year ago
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    yw!

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