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Mathematics 16 Online
OpenStudy (xmistermayhem):

What is the equation of a parabola with vertex (0, 0) and directrix y = 12.

OpenStudy (anonymous):

|dw:1441659396320:dw|the focus is equidistant from the directrix and the focus. the focus is the point (x, y) on the drawing

OpenStudy (xmistermayhem):

I don't understand...

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