Question

The domain of the following relation: R: {(−4, 8), (8, 10), (5, 4), (1, 6), (5, −9)} is

{8, 10, 4, 6, −9}
{−4, 1, 5, 8} - This one!
{−4, 8, 5, 1, 5}
No domain exists

Answer 1

Domain is x values so therefore
Domain: -4,8,5,1,5

Answer 2

there is 2 5's though

Answer 3

>>there is 2 5's though

Yes. In naming the domain, list "5" in the domain set only one time.

If "5" is in the domain, then it is in the domain no matter how many times it appears in the relation.

@Destroyer5