Question 754642
Vertex at (0,0) and focus at (0,-1)
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vertex:
(h,k)
(0,0)
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focus point:
(0,-1)
(0,p)
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we get p = -1
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so because the point of focus located in y-coordinate, so the parabola equation is:
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(x^2 - h) = 4p(y - k)
(x^2 - 0) = 4(-1)(y - 0)
x^2 = -4y
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The parabola equation is x^2 = -4y