How can you use a mapping diagram to determine the domain and the range of a relation?

Step 1: Draw the mapping diagram for the given relation.

Step 2: A relation is a function if each element in the domain is paired with one and only one element in the range.

Step 3: From the mapping diagram, it can be observed that the given relation is not a function as '3' in the domain is paired with two elements - 1 and - 2 in the range and '6' is paired with - 1 and - 2.

Domain Range

3 | - 1

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6 | - 2