y
2
= 4ax
y
2
= – 4ax
Focus = (a, 0)
Focus = (– a, 0)
Equation of the directrix x + a = 0
Eqn. of the directrix x – a = 0
Axis of the parabola y = 0
Axis of the parabola y = 0
Vertex = (0, 0)
Vertex = (0, 0)