The equation of the directrix of the parabola `x^(2) = 8y` is

The equation of the directrix of the parabola x ^(2) + 8y -2x =7 is

The equation of the directrix of the parabola x^2 = 28y = 0 is

Equation of the directrix of the parabola 5y^(2) = 4x is

The equation of the directrix of the parabola x^(2) - 4x - 8y + 12 = 0 is (i) y = 0 (ii) x - 1 = 0 (iii) y+ 1 = 0 (iv) x + 1 = 0

The equation of the directrix of the parabola y^(2)=-8x is

The-equation of the directrix of the parabola 2x^2=3y is

Equation of directrix of the parabola 3x^(2) = 8y is