Step-by-step explanation: all you have to do is start from add 1 each time you add a new line. You could do this using your fingers. Raise a finger for each line and count. Start at 5 for your first finger, and continue adding 1. Once you reach 7 fingers, you’ll have reached the number 11. This is the amount of marbles you have. You could also simply do 6+5, because you are adding 6 lines so you’ll have 6 more marbles then in the first line.
im going to assume it means you need to pick the one that has the coordinates for the place they intersect, and that would be (2.5, 0.5) x-axis comes first and y-axis comes second when writing coordinates.
