anonymous
  • anonymous
Find the standard form of the equation of the parabola with a focus at (7, 0) and a directrix at x = -7
Precalculus
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
I got x = 1/28 y2
jdoe0001
  • jdoe0001
the distance from the vertex to the focus is EXACTLY the same as from the vertex to the directrix the focus is in the direction where the parabola opens up the directrix is in the opposite side of the focus |dw:1378578897131:dw| so as you can see, the parabola is opening up to the right the vertex is half-way between the focus and the directrix, thus at the origin in this case the "focus form" for a parabola opening horizontally is \(\bf (y-k)^2=4p(x-h)\) (h, k) = vertex coordinates p = distance from the vertex to the focus [ or directrix for that matter ] if it opens to the right, the "p" is positive if it opens to the left, the "p" is negative
anonymous
  • anonymous
x = 1/28 y2

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jdoe0001
  • jdoe0001
yeap
anonymous
  • anonymous
Thank You.
jdoe0001
  • jdoe0001
yw

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