Answer: x
Explanation:
- A domain of a relation on a graph is the set of all x-values related to it.
From the given graph, it can be see that it is a line y=2 parallel to x axis.
i.e. For every x value, the y-value is constant as y=2.
Also, for any straight line , the domain of the relation is given by :-
Domain= Set of real values = x
Hence, the domain of the relation = x ∈ R