\[ \text { Relation } 3 \] \[ \{(h, r),(y, m),(r, m),(m, m)\} \] Function Not a function

The given relation is not a function because it does not satisfy the definition of a function. In a function, each input (domain element) must be associated with exactly one output (range element). In the given relation: - The input \( h \) is associated with the output \( r \). - The input \( y \) is associated with the output \( m \). - The input \( r \) is associated with the output \( m \). - The input \( m \) is associated with the output \( m \). Since the input \( m \) is associated with two different outputs (\( r \) and \( m \)), the relation is not a function.