Sangeetha Pulapaka

STEP 1: Recall what is a function

A function is a relation which pairs exactly each input with one output.

STEP 2: Recall what is a mapping diagram

mapping shows how the elements are paired. Its like a flowchart for a function, showing the input and output values. A mapping diagram consists of a domain

( the input) and the range ( the output)

STEP 3: Check if the given mapping diagram is a function

The given mapping diagram is a function because

  1. Every input is paired with at least one output.
  2. The domain is unique- the values in the domain are not repeated more than once

Further skills you may want to recall:

What is a relation

What is the domain and range of a relation or a function

How to determine if the relation is a function or not