Mathematics, 18.10.2019 19:30 reetajmahfouz3816

If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola?
a)the focus is at (0, 3), and the equation for the parabola is y2 = 12x.
b)the focus is at (0, –3), and the equation for the parabola is x2 = –12y.
c)the focus is at (3, 0), and the equation for the parabola is x2 = 12y.
d)the focus is at (–3, 0), and the equation for the parabola is y2 = –12x.

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If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola?
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