contestada

The domain of the following relation: R: {(-4, 8), (8, 10), (5, 4), (1, 6), (5, -9)} is (1 point)
{8, 10, 4, 6, -9}
O {-4, 1, 5, 8}
O {-4, 8, 5, 1,5}
No domain exists