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

Question 2

Multiple Choice

Find the vertex, focus, directrix, and focal width of the parabola.
- x2=36y\mathrm { x } ^ { 2 } = 36 \mathrm { y }


A) Vertex: (0,0) ( 0,0 ) ; Focus: (9,0) ( 9,0 ) ; Directrix: x=9x = 9 ; Focal width: 9
B) Vertex: (0,0) ( 0,0 ) ; Focus: (0,9) ( 0,9 ) ; Directrix: y=9y = - 9 ; Focal width: 36
C) Vertex: (0,0) ( 0,0 ) ; Focus: (9,0) ( 9,0 ) ; Directrix: y=9y = 9 ; Focal width: 144
D) Vertex: (0,0) ( 0,0 ) ; Focus: (0,9) ( 0 , - 9 ) ; Directrix: x=9x = - 9 ; Focal width: 144

Correct Answer:

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