Y=-4 compared to focus (3,-7) vertex is in middle so
-4 and -7, the average is -5.5 so vertex is (3,-5.5) and distance from vertex to focus is from -5.5 to -7 or 1.5 focus is below vertex is p is negative
(x-3)^2=4(-1.5)(x+5.5) (x-3)^2=-6(x+5.5) D is answer