anonymous
  • anonymous
Can someone please explain to me the steps to graphing quadratics?? im very confused
Mathematics
katieb
  • katieb
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jim_thompson5910
  • jim_thompson5910
You simply need the vertex and a few points that are on the right and left of the vertex
jim_thompson5910
  • jim_thompson5910
Here's a plot of points |dw:1342991570563:dw|
jim_thompson5910
  • jim_thompson5910
here's the vertex |dw:1342991631719:dw|

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jim_thompson5910
  • jim_thompson5910
Now draw a curve through all the points to graph the parabola |dw:1342991670542:dw|
jim_thompson5910
  • jim_thompson5910
This is of course an example, so your vertex may be in a different location
anonymous
  • anonymous
but how do u get the points?
jim_thompson5910
  • jim_thompson5910
you plug in arbitrary values of x to get corresponding values of y (this is to get any point on the parabola)
jim_thompson5910
  • jim_thompson5910
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
anonymous
  • anonymous
oh okay...that makes sense thankyou
jim_thompson5910
  • jim_thompson5910
you're welcome

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