Which is the graph of fx equals to 3 x squared

3x2 = f(x) is a parabola that follows the general equation of a parabola (x-h)^2 = 4a(y-k) in which the vertex is lying on the center (0,0) and that the shape is facing upwards. The directrix is located at y = -1/12 and the focus is located at point coordinate (0,1/12).