Answer:
(1,2),(3,4),(5,6),(7,8),(9,10)
there's no same number in the domains so its FUNCTION.
Step-by-step explanation:
example;
(1,4),(2,7),(1,8)
its NOT FUNCTION because the domain has a pair of numbers, the number 1. But if ever the range has a pair, its still FUNCTION because we define if its whether a FUNCTION or NOT FUNCTION only in DOMAIN SIDE.