SOLUTION: Write an equation of a parabola with a vertex at the origin and a directrix at y = 5

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Question 419366: Write an equation of a parabola with a vertex at the origin and a directrix at y = 5
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
parabola with a vertex at the origin and a directrix at y = 5
The standard form is , where the focus is (h,k + p)
p = -5
parabola opening downward y = -20x^2


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