Question 429647
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi

 The standard form is {{{(x -h)^2 = 4p(y -k)}}}, where  the focus is (h,k + p) 
 x^2 = 16y   | Vertex is Pt(0,0), p = 4 and focus is Pt(4,0)
{{{drawing(300,300,   -6, 6, -6, 6,  grid(1),
circle(0, 0,0.3),
circle(4, 0,0.3),
graph( 300, 300, -6, 6, -6, 6,0, .25sqrt(x),-.25sqrt(x)))}}}