In each of

Focus (0, -3); directrix y = 3

Since, the focus lies on the y–axis, the y-axis is the axis of the parabola.

Thus,

The equation of the parabola is either of the form x² = 4ay or x² = -4ay.

It is also seen that the directrix, y = 3 is above the x- axis, while the focus (0,-3) is below the x-axis.

Hence, the parabola is of the form x² = -4ay.

Here, a = 3

Thus, the equation of the parabola is x² = -12y.