Question

EASY 20 POINTS!

Find the standard form of the equation of the parabola with a focus at (3, 0) and a directrix at x = -3.


y = one divided by twelve x2

-12y = x2

x = one divided by twelve y2

y2 = 6x

Answer 1

Its the 3rd choice.

Explanation:

The general form for this type of parabola is y^ = 4ax where a is the x coordinate of the focus.

So it is y^2 = 4*3 * x

= y^2 = 12 x

or x = 1/12 y^2