I require assisstance!
Derive the equation of the parabola with a focus at (0, 1) and a directrix of y = −1.
f(x) = −one fourth x2
f(x) = one fourth x2
f(x) = −4x2
f(x) = 4x2

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What is the directrix? How can we use this to help us derive the parabola?

Honestly I have no clue, Can you give me like a quick run down on how to do any of this?

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