Question

Select the relations that are functions.

{a, 1), (6, 1), (C, 1);

{a, a),(a, b),(a, c)}

{(1, a), (2, a),(3, a)}

{a, a), (b, b), (C, c)}

Answer 1

option A, C and D

Explanation:

Each relation is a function if each input has only one output

{a, 1), (6, 1), (C, 1)

This relation is a function because each input has only one output

{a, a),(a, b),(a, c)}

This relation is not a function because input 'a' has only three output

{(1, a), (2, a),(3, a)}

This relation is a function because each input has only one output

{a, a), (b, b), (C, c)}

This relation is a function because each input has only one output