Correct Answer - Option 1 : 2y - 11 = 0
Concept:
Parabola, x2 = 4ay, where a > 0, then
Equation of directix, y + a = 0
Parabola, x2 = - 4ay, where a > 0, then
Equation of directix, y - a = 0
Calculation:
Given parabolic equation, x2 = - 22y
On comparing with standard equation, x2 = -4ay , we get a = \(\frac{11}{2}\)
We know that equation of directrix, y - a = 0
⇒ y - \(\frac{11}{2}\) = 0
⇒ 2y - 11 = 0 .
The correct option is 1.
