SOLUTION: Graph the parabola and find the focus,and directrix of the equation. 5x^2=-15y

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Question 890674: Graph the parabola and find the focus,and directrix of the equation. 5x^2=-15y
Answer by lwsshak3(11628) About Me  (Show Source):
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Graph the parabola and find the focus,and directrix of the equation. 5x^2=-15y
5x^2=-15y
x^2=-3y
This is an equation of a parabola that opens down with vertex at the origin.
Its basic form: x^2=-4py
For given problem:
vertex:(0,0)
axis of symmetry: x=0 or y-axis
4p=3
p=3/4
focus: (0,-3/4)
directrix: y=3/4
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