Question 166194
The general equation for a parabola is,
{{{4p(y-k)=(x-h)^2}}}
where (h,k) is the vertex of the parabola and p is the distance from vertex to focus.
In your case, 
(h,k)=(0,0)
p=4
{{{4(4)y=x^2}}}
{{{y=x^2/16}}}
{{{ graph( 300, 300, -20, 20, -10, 10,  x^2/16) }}}