The focus of a parabola is (0,−4) . The directrix of the parabola is the line y=−5 .

Question

What is the equation of the parabola?

y=−1/4x^2+4

y=1/2x^2−9/2

y=−1/2x^2−9/2

y=1/4x^2−4

Answer 1

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https://www.jiskha.com/questions/1815358/the-directrix-of-a-parabola-is-y-4-the-focus-of-the-parabola-is-2-2-what-is