You can put this solution on YOUR website! find the directix of the parabola: y^2 = x
This equation follows the form (y-0)^2=4p(x-0)
4p=1
p=1/4
The vertex is at (0,0)
The directrix is a vertical line 1/4 to the left of the vertex:
Drectrix is x=-1/4
Cheers
Stan H.