Consider the parabola with a focus at the point (4,0) and directrix y = 3. Which equation can be used to correctly relate the distances from the
focus and the directrix to any point (x, y) on the parabola?
A. a= y - 3; a= _/(x - 4)^2+ (y +0)^2
B. a = y-3, a=_/(x-4)^2+(y+0)^2

C. a = 3-y, a = _/(x-4)^2 + (y +0)^2

D. a = 3-y; a = _/(x+4)^2 + (y+0)^2