Question

Which function has a domain where x=3 and a range where y=2?

Answer 1

One simple choice is f(x) = x − 1. Its domain includes x = 3 and f(3) = 3 − 1 = 2, so the range contains y = 2.

(Another example: the constant function f(x) = 2 has domain containing 3 and range {2}.)