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carlenstar281

  • 3 years ago

math question help

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  1. aajugdar
    • 3 years ago
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    shoot

  2. carlenstar281
    • 3 years ago
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    is the line up or down for graphing y = –2x² + 2

  3. electrokid
    • 3 years ago
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    1) this is a quadratic and cannot be a "line". It is a "curve"

  4. carlenstar281
    • 3 years ago
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    thats what i mean sorry is the curve up or down

  5. electrokid
    • 3 years ago
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    2) we then check the coefficient of the highest power of "x"

  6. carlenstar281
    • 3 years ago
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    i put it as down but im not sure

  7. electrokid
    • 3 years ago
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    it will first increase from -infinity, then reach a maximum and then decrease

  8. carlenstar281
    • 3 years ago
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    okay i get that

  9. carlenstar281
    • 3 years ago
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    so does it look like this then

  10. electrokid
    • 3 years ago
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    |dw:1364413141919:dw|

  11. carlenstar281
    • 3 years ago
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    sorry i couldn't draw it

  12. electrokid
    • 3 years ago
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    looks like this. I cannot see your picture.

  13. carlenstar281
    • 3 years ago
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    oh sorry it was a pic that looked like the one you drew except the curve was under the x axis is that correct?

  14. electrokid
    • 3 years ago
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    yep. So, it first increases and then decreases. did you study derivatives?

  15. carlenstar281
    • 3 years ago
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    yes and thank you :)

  16. cahit
    • 3 years ago
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    curve is under the x axis and downward.. at x = 0 it peak

  17. cahit
    • 3 years ago
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    at y =0 you can find x value and at x= 0 find value of y...

  18. electrokid
    • 3 years ago
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    if you had studied derivatives, this becomes way easier

  19. carlenstar281
    • 3 years ago
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    just a little bit and thank you again all for helping

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