The highest point as well as coordinates on the graph is the absolute maximum and it's coordinates. From the graph, the highest point is where = 0 and y = 4
The coordinate is (0, 4)
The lowest point as well as coordinates on the graph is the absolute minimum and it's coordinates. From the graph, the highest point is where = - 3 and y = - 5
The coordinate is (- 3, - 5)