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OpenStudy (megatron):
Derive the equation of the parabola with a focus at (4,-7) and a directrix of y= -15. Put the equation in standard form. If you could show me how to do it, that would be greatly appreciated. Thank you(:
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OpenStudy (mertsj):
The vertex is half way between the focus and the directrix. So your first job is to find the vertex.
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