Determine whether each relationship is a function. state the domain and range of each relation.

The answer is:

The relation is not a function

Domain: {3,2,1}

Range: {0,1,4,5}

Since the value 3 (domain) has two values at the output (0 and 1), the relation is not a function.  A function only exists when there is exactly a output value for each input, if there is more than one output for each input, the relation is not a function.

For this case, 3 (domain) has two outputs (0 and 1), so the relation is not a function.

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