Question

Use a mapping diagram to determine whether the relation is a function.(3,7),(3,8)(5,2),(4,5),(3,1)

Answer 1

Below.

Explanation:

3 ------- > 7

3 --------> 8

5 --------> 2

4 --------> 5

3 --------> 1

This is not a function because 3 maps to 1, 7 and 8.

This is a one-to-many relation - a function can be only one-to-one or many-to-one.

Answer 2

it's not a function because 3 is mapped with 7,8, and 1, but in a function, each domain has only one range.