Relation 4 (0,m),(7,m),(7,c),(-1,m) Function Not a function

relation is a function if each input (first element of the ordered pairs) is associated with exactly one output (second element).<br /><br />Let's examine the given relation:<br /><br />\[<br />\{(0, m), (7, m), (7, c), (-1, m)\}<br />\]<br /><br />- The input \(0\) maps to \(m\).<br />- The input \(7\) maps to both \(m\) and \(c\).<br />- The input \(-1\) maps to \(m\).<br /><br />Since the input \(7\) is associated with two different outputs (\(m\) and \(c\)), this relation is **not a function**.