In that case, you don't want to relist the values (as you did), but instead find a formula relating the inputs and outputs. You can try to
find the next number in the sequence, since you are counting by 1s for the x-values. Or you could do a regression in your calculator. Or you could plot the points, and see what you can come up with.
What method(s) are you supposed to use? How far have you gotten in applying what they've given you?