Multiple Choice
What are the focus and directrix of the parabola with the equation y = one-twelfthx2?
A. focus: (3, 0) ; directrix: y = –3
B. focus: (–3, 0) ; directrix: y = 3
C. focus: (0, 3) ; directrix: y = –3
D. focus: (0, –3) ; directrix: y = 3