Question

Which of the following relations has a domain of {2, 3, 6}? Choose all that apply. {(3, 3), (2, 2), (3, 2), (6, 1)} {(3, 1), (6, 4), (2, 4), (6, 5)} {(0, 2), (3, 3), (5, 6)} {(3, 2), (5, 3), (2, 6), (4, 3)}

Answer 1

All except (0,2), (5,6), (5,3), and (4,3).  The domain is the x and the range is the y, so the x coordinate has to either be 2, 3, or 6.