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bry856

  • one year ago

how to find RATE OF CHANGE between 2 points?

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  1. bry856
    • one year ago
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    such as (-4,-2) or (-2,1)

  2. Hayleymeyer
    • one year ago
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    For two points at (x1,y1) and (x2,y2), respectively, the rate of change is equal to the slope of the shortest possible line segment connecting the two points. This slope can be calculated by the following equation: m = (y2-y1)/(x2-x1)

  3. bry856
    • one year ago
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    i dont have enough numbers though to use that equation

  4. bry856
    • one year ago
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    this is what it looks like

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  5. Hayleymeyer
    • one year ago
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    ohh! idk how to do that part! sowwiee <3

  6. anonymous
    • one year ago
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    you do have enough points to use that equation. [-4, -2] is an interval, not a point. They're saying find the slope between the points where x = -4 and x = -2. What is the y-value when x = -4, and what is it for x = -2?

  7. bry856
    • one year ago
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    y= -12 when x= -4, and y= 0 when x= -2

  8. anonymous
    • one year ago
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    ok. so the points are (-4, -12) and (-2, 0). \[ROC=\frac{ y _{2}-y _{1} }{ x _{2} -x _{1}}=\frac{ 0-(-12) }{ -2-(-4) }\]

  9. bry856
    • one year ago
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    and that equals 6 right

  10. bry856
    • one year ago
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    i cant get an equal answer when i try to do (-2,1)

  11. anonymous
    • one year ago
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    yes it's 6. Can you show me what you did for [-2, 1]?

  12. bry856
    • one year ago
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    ohhh i accidentally put exponents , i now got 1

  13. bry856
    • one year ago
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    |dw:1433864867540:dw|

  14. bry856
    • one year ago
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    thank you

  15. anonymous
    • one year ago
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    yes that's right. You're welcome

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