Question

Which relations are functions and which are not functions?

Column A Column B
1.
{(3, 7), (3, 6), (5, 4),
(4, 7)}
2.
{(1, 5), (3, 5), (4, 6),
(6, 4)}
3.
{(2, 3), (4, 2), (4, 6),
(5, 8)}
4.
{(0, 4), (3, 2), (4, 2),
(6, 5)}

A.
function
B.
not a function

Answer 1

1)B
2)A
3)B
4)A
1 has a repeated value of 3
2 has no repeated x values
3 has a repeated value of 4
and d has no repeated x values.
Hope this helps! :)