Parabola Help! (1 Viewer)

[Maddy]

Ok, This is a simple question but i don't understand it, so i need help!!
How do I find the coordinates of the vertex and the focus???

I learnt it but now it doesn't make much sense!!
Please help me!!!

 

[Chand]

You make the equation into the form

(x-h)^2 = 4a (y-k)

vertex: (h, k)
focus: (h, k+a)

Directix: y=k-a
Axis of symmetry: x=h

 

[Chand]

The above is for a parabola who's vertex is not the origin.^

When the vertex is the origin...:

x^2 = 4ay

Vertex: (0,0)
Focus: (0, a)
Directix: y=-a
Axis of symmetry: x=0

 

[Maddy]

I LOVE U!!!!!!!!!!!!!!!!!!!!!!!

 

[Lexicographer]

Nuh, why don't you marry her then!

 

[Chand]

Originally posted by Maddy
I LOVE U!!!!!!!!!!!!!!!!!!!!!!!

umm..err..a thanks would have been sufficient, but nice to know I can help.

Originally posted by Lexicographer
Nuh, why don't you marry her then!