Final answer:
The given relation {(x,2),(3,1)} is a function with no restrictions on the value of x.
Step-by-step explanation:
A relation is a function if each input value has only one corresponding output value. In this case, the given relation is {(x,2),(3,1)}. To determine if this is a function, we need to check if there are any repeated input values. In other words, there cannot be two different output values for the same input value. Since there are no repeated input values in this relation, {(x,2),(3,1)} is a function.
Therefore, the value of x can be any value because the given relation is a function and there are no restrictions on the input value x.