Question

Which relations are functions and which are not functions?


Column A
Column B

1.

{(3, 2), (6, 4), (9, 6),

(12, 8)}
2.

{(2, 3), (2, 5), (3, 6),

(9, 4)}
3.

{(4, 2), (6, 3), (4, 8),

(6, 6)}
4.

{(3, 4), (5, 2), (6, 8),

(6, 4)}
A.

function
B.

not a function

Answer 1

1.{(3, 2), (6, 4), (9, 6),

(12, 8)} is a function