Answer:
C. P and Q
Explanation:
The set of ordered pairs that represents a function is a set whereby each x-value has exactly just one corresponding y-value. That is, no x-value would have different y-values paired to it.
For P, each x-value has exactly one y-value paired with it. Therefore, P is a function.
Also, for Q, every x-value has exactly one y-value paired with it. No x-value gives two different y-values. Therefore, Q is also able function.
Thus, both P and Q represents a function.