Question

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

answer is B

Answer 1

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.

B) Is the answer.

Answer 2

It will open upwards or downwards . It will contain a term in x^2.