Question

Find the standard form of the equation of the parabola with a focus at (0, -9) and a directrix y = 9.
The answers are:
y= -1/9 x^2
y^2 = -36x
y = -1/36 x^2
y^2 = -9x

Answer 1

@ant501

Answer 2

yes?

Answer 3

I'm unsure about this one. Would it be A?

Answer 4

yeah think so let me do the math real quick

Answer 5

yeah if my calculations are right it would be

Answer 6

Thank you! And here is your medal as promised. :)

Answer 7

I gave you a medal also and thanks