Find the focus and directrix of each parabola with the given equation.

label Algebra
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x2 = -4y

A. Focus: (0, -1), directrix: y = 1

B. Focus: (0, -2), directrix: y = 1

C. Focus: (0, -4), directrix: y = 1

D. Focus: (0, -1), directrix: y = 2

Jun 4th, 2015

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Jun 4th, 2015

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