Using the graph, determine the coordinates of the vertex of the parabola.
x = - 2 and x = 4 and y = -8
We are given three coordinates: (-2, 0), (4, 0), and (0, -8). The x-coordinate of the vertex is the average of the x-coordinates of the two x-intercepts, which is:
((-2) + 4)/2 = 2/2 = 1
Since the y-coordinate of the vertex is the same as the y-coordinate of the point on the graph, y = -8, the coordinates of the vertex are (1, -8).