The key hint is "8 units up from the x-axis." Essentially this means that the questions wants you to find any point on the graph that's 8 units above any of the x-axis points.
(0,0 / 1,0 / 2,0 / 3,0 / 4,0 / 5,0 / 6,0 / 7,0 / 8,0 / 9,0 10,0 are all the points on the x-axis.
A simple way of explaining this answer is any answer choice that has 8 as the y-axis. In this case the correct answer is (4, 8).
Best of Luck!
