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Identification of function: A function is a relation in which each element of the domain is paired with exactly one element of the range.
\Observe the relation as the table, the relation is a function. The each element in the domain paired with exactly one element in the range.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
No, the relation is not a function.