The general form for this is y^2 = 4ax where a = focus
the directrix is same distabce behind the vertex as focus is in font so focus a = 4
so we have y^2 = 16 x
or
x = (1/16) y^2
Its C
Answer <span>B.X= 3 1/8
</span><span>X+7/8=4
x = 4 - 7/8
x =3 8/8 - 7/8
x = 3 1/8</span>
Answer: second one is the answer
Hope this helps, im sure of my answer
