Question

The ordered pairs (1,1), (2,4), (3,9), (4,16) and (5,25) represent a function.what is a rule that represents this function?

Answer 1

The y coordinates {1, 4, 9, 16, 25} are perfect squares
1 = 1^2
4 = 2^2
9 = 3^2
16 = 4^2
25 = 5^2

The function rule is f(x) = x^2 which you can write as y = x^2