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ashleyb

Can someone please explain to me the steps to graphing quadratics?? im very confused

  • one year ago
  • one year ago

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  1. jim_thompson5910
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    You simply need the vertex and a few points that are on the right and left of the vertex

    • one year ago
  2. jim_thompson5910
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    Here's a plot of points |dw:1342991570563:dw|

    • one year ago
  3. jim_thompson5910
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    here's the vertex |dw:1342991631719:dw|

    • one year ago
  4. jim_thompson5910
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    Now draw a curve through all the points to graph the parabola |dw:1342991670542:dw|

    • one year ago
  5. jim_thompson5910
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    This is of course an example, so your vertex may be in a different location

    • one year ago
  6. ashleyb
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    but how do u get the points?

    • one year ago
  7. jim_thompson5910
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    you plug in arbitrary values of x to get corresponding values of y (this is to get any point on the parabola)

    • one year ago
  8. jim_thompson5910
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    to get the vertex, you use the formula x = -b/(2a) once you know this x value, you then plug it in to find y

    • one year ago
  9. ashleyb
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    oh okay...that makes sense thankyou

    • one year ago
  10. jim_thompson5910
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    you're welcome

    • one year ago
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