Thursday

March 5, 2015

March 5, 2015

Posted by **victor** on Wednesday, August 3, 2011 at 8:25am.

- mathematics -
**Henry**, Wednesday, August 3, 2011 at 9:34pmThe vertex is mid-way between the directrix and focal point:

D(0,5)

V(0,0)

F(0,y)

FV = VD = 1/4a = 5,

0 - y = 5,

Y = -5.

1/4a = 5,

Multiply both sides by 4a:

20a = 1,

a = 1/20.

Vertex Form: Y = a(x-h)^2 + k,

Y = 1/20(x-0)^2 + 0,

Eq: Y =(1/20)x^2

**Answer this Question**

**Related Questions**

algebra - 6. Find the equation of each parabola described below. a) parabola ...

Algebra - Can someone tell me if I am right? I need to find the equation of a ...

algebra problem - I need to find the equation of a parabola. I am not sure if ...

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 ...

Math - Find the vertex, focus, and directrix of the parabola. x^2 - 2x + 8y + 9...

pre cal - What is the center of the conic whose equation is x^2 + 2y^2 - 6x + ...

Vertex, Focus, & Directrix of Parabolas - Find the Vertex, Focus, and Directrix ...

math - determine vertex, focus and directrix of parabola. then graph the ...

Math - determine vertex, focus and directrix of parabola. then graph the ...