Option C: domain :

Step-by-step explanation:
The given 6 points on a coordinate plane are
and

The domain is the set of all x-coordinates of the ordered pairs.
Thus, writing the set of all x-coordinates from the ordered pairs
and
, we have,
Domain :
is the set of all x-coordinates from these ordered pairs.
Hence, the domain of the relation
and
is

Hence, Option C is the correct answer.