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OpenStudy (anonymous):
What is the equation of the parabola with a directrix at y = -4 and focus (0, 4)?
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OpenStudy (anonymous):
A. x=-1/16y^2 B. y=-1/16x^2 C. y=1/16x^2 D. x=1/16y^2
OpenStudy (anonymous):
So what is your vertex?
OpenStudy (anonymous):
i dont know
OpenStudy (anonymous):
|dw:1446854913842:dw|
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