Find the Vertex, Focus, and Directrix of the Parabola $y = - 3 x ^ { 2 }$

question 29

Multiple Choice

Find the vertex, focus, and directrix of the parabola. $y = - 3 x ^ { 2 }$

• A)Vertex: (0,0); Focus: \(\left( 0 , - \frac { 1 } { 12 } \right)\) ; Directrix: \(y = - \frac { 1 } { 12 }\)
• B)Vertex:(0,0) ; Focus: \(\left( 0 , - \frac { 1 } { 12 } \right)\) ; Directrix: \(y = \frac { 1 } { 12 }\)
• C)Vertex: (0,0); Focus: \(\left( 0 , \frac { 1 } { 3 } \right)\) ; Directrix: \(y = \frac { 1 } { 3 }\)
• D)Vertex: (0,0); Focus: \(\left( 0 , \frac { 1 } { 12 } \right)\) ; Directrix: \(y = \frac { 1 } { 12 }\)
• E)Vertex: (0,0); Focus: \(\left( 0 , - \frac { 1 } { 3 } \right)\) ; Directrix: \(y = \frac { 1 } { 3 }\)

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