Question

The domain of the following relation: R: {(6, -2), (1, 2), (-3, -4), (-3, 2)} is

{-3, -3, 1, 6}

{-4, -2, 2, 2}

{-4, -2, 2}

{-3, 1, 6}

Answer 1

list the first numbers
don't list an twice

Answer 2

{6,1,-3,-3}