Final answer:
The x-value '7' is associated with more than one y-value in the given relation, which indicates that the relation is not a function.
Step-by-step explanation:
The student has asked which x-value has more than one y-value associated with it in the given relation. To identify if a relation is a function, each x-value should be paired with exactly one y-value. Reviewing the set of ordered pairs provided: {(6,8), (7,10), (7, 12), (8, 16), (10, 16)}, it is evident that the x-value 7 is associated with two different y-values: 10 and 12. Therefore, the x-value with more than one y-value associated with it, which means the relation is not a function, is 7.