Answer:
(1, 1), (2, 4), (3, 9), (4, 16)
Step-by-step explanation:
You recognize that, of the numbers in Y, 20 is not a square. You also recognize that the remaining values of Y correspond to the squares of the values of X:
(x, x^2) = {(1, 1), (2, 4), (3, 9), (4, 16)}
