anonymous
  • anonymous
What is the equation of the following graph?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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anonymous
  • anonymous
\[y^2=4px\]find out the p
anonymous
  • anonymous
you can do that or do you need help?

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anonymous
  • anonymous
I need help, I don't understand /:
anonymous
  • anonymous
1 way to find p is to use absolute value of the distance between the origin of your parabola and the directrix.
anonymous
  • anonymous
|dw:1438925592999:dw|
anonymous
  • anonymous
since we are finding positive p you have to multiple by -1
anonymous
  • anonymous
but how to I find the correct absolute value?
anonymous
  • anonymous
look at the graph
anonymous
  • anonymous
when y=10 x=5 can't we make use of that @saseal ?
anonymous
  • anonymous
@R05E you have to be sure if that is your focus
anonymous
  • anonymous
the ------ line shows the directrix @saseal ?
anonymous
  • anonymous
yea thats the directrix line
anonymous
  • anonymous
then p=5 @saseal ?
anonymous
  • anonymous
yes
anonymous
  • anonymous
but if we put y=10 and x=5 we get p=1... why is that? :\
anonymous
  • anonymous
|dw:1438927425580:dw|
anonymous
  • anonymous
because directix=-p and focus is (p,0)
anonymous
  • anonymous
it just happens in this question that y=10 x=5 at the focus, doesnt mean it will always happen
anonymous
  • anonymous
So the equation of the parabola is y^2=20x or y^2=4x ? I'm confused... @saseal ...:(
anonymous
  • anonymous
y^2=4(5)x -> y^2=20x
anonymous
  • anonymous
but by plugging in the coordinates we cant make sure of the equation... why's that?
anonymous
  • anonymous
theres always 2 answers to the parabola unless you are at origin. good luck pluggin em out
anonymous
  • anonymous
sorry sorry I got that wrong thank you very very much by the way!!! @saseal... for your patience and kindness!! I love you!! I will medal you..!!!
anonymous
  • anonymous
yw

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