Babynini
  • Babynini
Parabolas and equations
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Babynini
  • Babynini
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Babynini
  • Babynini
@rvc
Babynini
  • Babynini
@ganeshie8

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ganeshie8
  • ganeshie8
First of all notice that the parabola with a directrix equation x = -1/3 opens to the right : |dw:1433218519063:dw|
Babynini
  • Babynini
It's not the x line that is moving up and down, but rather y moving?
ganeshie8
  • ganeshie8
the general form of equation of parabola that opens to right is \[\large x = \frac{1}{4c}y^2\] where \(c = \) distance between directrix and vertex
ganeshie8
  • ganeshie8
|dw:1433218643337:dw|
ganeshie8
  • ganeshie8
so the equation would be \[\large x = \frac{1}{4*\frac{1}{3}}y^2\] simplify
Babynini
  • Babynini
0.75y^2
Babynini
  • Babynini
or 3/4y^2
ganeshie8
  • ganeshie8
x = 3/4 y^2
ganeshie8
  • ganeshie8
it is an equation, so you need to write the left hand side also ok
ganeshie8
  • ganeshie8
the equation of parabola in question is \[x = \frac{3}{4}y^2\]
Babynini
  • Babynini
Yep :) thank you so much!! I had been accidentally writing it like |dw:1433218892849:dw| so that's why it was all wack
ganeshie8
  • ganeshie8
i see.. remember x = k is a "vertical line"
Babynini
  • Babynini
I shall from now on ^-^ hah

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