$\"\"$

Definition of a function :

A function is a special type of relation in which each element of the domain is paired with exactly one element of the range.

$\"\"$

The relation does not represents $\"\"$ as a function of $\"\"$ because each element in the domain does not corresponds to exactly one element in the range.

The domain of the function is $\"\"$ .

The range of the function is $\"\"$ .

The element $\"\"$ of the domain is paired with more than one element of the range, i.e, $\"\"$ and $\"\"$ .

Thus, the relation does not represents $\"\"$ as a function of $\"\"$ .

$\"\"$

The relation does not represents $\"\"$ as a function of $\"\"$ .