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Find the Vertex, Focus, Directrix, and Focal Width of the Parabola

Question 69

Multiple Choice

Find the vertex, focus, directrix, and focal width of the parabola.
- (x9) 2=8(y+6) ( x - 9 ) ^ { 2 } = - 8 ( y + 6 )


A) Vertex: (6,9) ( - 6,9 ) ; Focus: (8,9) ( - 8,9 ) ; Directrix: x=11x = 11 ; Focal width: 2
B) Vertex: (9,6) ( - 9,6 ) ; Focus: (9,2) ( - 9 , - 2 ) ; Directrix: y=14y = 14 ; Focal width: 8
C) Vertex: (6,9) ( - 6,9 ) ; Focus: (14,9) ( - 14,9 ) ; Directrix: x=17x = 17 ; Focal width: 8
D) Vertex: (9,6) ( 9 , - 6 ) ; Focus: (9,8) ( 9 , - 8 ) ; Directrix: y=4y = - 4 ; Focal width: 8

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