Question

Determine which of the following mappings are functions. If the relation is not a function, indicate why it is not.

Answer 1

Explanation:

1. the first mapping is a function

2. the second mapping is not a function, because: B has 2 relations, C & E have no relations.

3. the third mapping is a function

4. the fourth mapping is not a function, because B has no relation.

Answer 2

• First mapping is a function because there is no more than one output for each input.
• Second mapping is not a function because there is more than one output for input B.
• Third mapping is a function because there is no more than one output for each input.
• Fourth mapping is a function because there is more than one output for each input.

Explanation:

A function can be defined as two variables (independent and dependent) which cannot have more than one output for each input.