SOLUTION: Identify the vertex, focus, and directrix of the parabola. x=-1/4(y+1)^2+2

Algebra ->  Coordinate-system -> SOLUTION: Identify the vertex, focus, and directrix of the parabola. x=-1/4(y+1)^2+2      Log On


   

Question 724037: Identify the vertex, focus, and directrix of the parabola. x=-1/4(y+1)^2+2
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Identify the vertex, focus, and directrix of the parabola. x=-1/4(y+1)^2+2
----
Form: (y-k)^2 = 4p(x-h)
----
Your problem:
(y+1)^2 = -4(x-2)
----
Vertex: (2,-1)
4p = -4
p = -1
-----
Focus: (2+-1,-1) = (1,-1)
---
Directrix: (2--1,-1) = (3,-1)
===================
Cheers,
Stan H.