Hi,
the vertex form of a Parabola opening up(a>0) or down(a<0), 
 
where(h,k) is the vertex  and  x = h  is the Line of Symmetry
The standard form is 
, where  the focus is (h,k + p)
With Directrix y = -(k+p)
focus (0,6) and directrix y= -10,  p = 
  4p = 32
  y = (1/32)x^2 -2
