Determine Whether the Relation Represents a Function or a Nonfunction

Multiple Choice

Determine whether the relation represents a function or a nonfunction. If the relation is a nonfunction, explain how the definition of a function is violated. {(-9, 10) , (-12, 11) , (-7, 8) , (-10, 13) , (-13, 11) , (-5, 7) }

A) Function
B) Nonfunction; -12 and -13 are both paired with 11.