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

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

will.h · Answer

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

destroyer5 · Answer

there is 2 5's though

directrix · Answer

>>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