Posted by **Jon** on Thursday, August 6, 2009 at 6:20pm.

Identify the equation of a parabola whose focus is at (5,-1) and whose directrix is x=3.

vertex=(-5,-1)

p=-6

4p=-24

(x-5)=(-24)(y+1)^2

I got it wrong

- Math -
**MathMate**, Thursday, August 6, 2009 at 6:35pm
Hint:

The focus is at (5,-1), and the directrix is at x=3, so the vertex lies halfway between the two.

The value of p is the distance between the vertex and the focus.

Wiki has an excellent article on the subject.

http://en.wikipedia.org/wiki/Parabola

## Answer this Question

## Related Questions

- Advanced Math - Identify the equation of a parabola whose focus is at (5,-1) and...
- pre cal - What is the center of the conic whose equation is x^2 + 2y^2 - 6x + ...
- algebra - 6. Find the equation of each parabola described below. a) parabola ...
- Math - Identify th equation of the parabola whose focus is at (5,-1) and whose ...
- Math - Identify th equation of the parabola whose focus is at (5,-1) and whose ...
- Math - Identify th equation of the parabola whose focus is at (5,-1) and whose ...
- Math - Find the vertex, focus, and directrix of the parabola. x^2 - 2x + 8y + 9...
- Math - Write the standard form of the equation of the parabola whose directrix ...
- maths - Given that the equation of the parabola is 5y^2 + 24x = 0. Find (1)The ...
- Pre Cal - write the equations of the parabola, the directrix, and the axis of ...

More Related Questions