SOLUTION: Whats the standard form of a parabola with vertex at origin and directrix of x=5?

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Question 619251: Whats the standard form of a parabola with vertex at origin and directrix of x=5?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Whats the standard form of a parabola with vertex at origin and directrix of x=5?
since directrix x=5 is to the right of the (0,0) vertex, parabola opens leftwards and p=5
equation:
y^2=4px
y^2=-20x