Q. 84.3( 27 Votes )

In each of

Answer :

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.


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