Determine the vertex, focus, and directrix of the parabola and sketch its graph.x2 = -12y

A. vertex: (0, 0)
focus: (3, 0)
directrix: x = -3

B. vertex: (0, 0)
focus: (0, -3)
directrix: y = 3

C. vertex: (0, 0)
focus: (0, 3)
directrix: y = -3

D. vertex: (0, 0)
focus: (-3, 0)
directrix: x = 3


Answer: B

Mathematics

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A.  ? 
B.
C.
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