the focus of a parabola is (-4,2). its directrix is x= -6. what are the equation and the vertex of the parabola?
A. x + 5 = 1/4(y-2)^2 ; vertex: (-5,2)
B. x + 5 = (y-2)^2 ; vertex: (-5,2)
C. y + 2 = 1/16(x+4)^2 ; vertex: (-4,-2)
D. y + 2 = 4(x+4)^2 ; vertex: (-4,-2)
