SOLUTION: Find the focus, directrix, and focal diameter of the parabola. 9x + 7y2 = 0 focus (x, y) = directrix focal diameter graph:

Question 314229: Find the focus, directrix, and focal diameter of the parabola.
9x + 7y2 = 0
focus (x, y) =
directrix
focal diameter
graph:
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Compare to general equation of a parabola,

.
.
.
is the distance from the focus to the vertex.
.
.
.
The vertex is at (,).
The focus is (,).
The x coordinate of the directrix is the same distance from the vertex in the opposite direciton.
The directrix is

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