Based on your description of the parabola, it appears that the vertex is at the highest point of the concave down parabola. Since you mentioned that the parabola curves up from -2 to 4 and then curves down at 4, it suggests that the vertex is at the point where \( x = 4 \) and \( y = -2 \).
Thus, the coordinates of the vertex are:
(4, -2)