SOLUTION: What is the equation of a parabola with vertex (0, 0) and directrix x = -3.

SOLUTION: What is the equation of a parabola with vertex (0, 0) and directrix x = -3.

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Question 767881: What is the equation of a parabola with vertex (0, 0) and directrix x = -3.
Answer by DSMLMD(16) (Show Source): You can put this solution on YOUR website!
Vertex at (0, 0) and directrix x = -3

Vertex
(0,0)
(a,b)

directrix formula:
x = -p
x = -(-3)
x = 3

because the directrix located at x-coordinate, the parabola equation is:

(y-b)^2 = 4p(x-a)
(y-0)^2 = 4(3)(x-0)
y^2 = 12x
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