Look at 3 on Variable B's axis, then go to the right until you reach the line.
After you reach the line, go all the way down and see what number you get to on Variable A's axis. You get 8, so that is your answer.
10, 000, 000 = ten million
40, 000 ,000 is the answer for the nearest ten million
21 they have too be right next to each other and threy have too be right
