The domain of the relation is {2, 7, 8, 11, 15}
From the table given, we have a set of input, x and output , y values .
The domain of a function or relation is simply the set of input values of the function.
Here, the set of input , x values are 2, 7, 8, 11 and 15 .
Therefore, The domain of the relation is {2, 7, 8, 11, 15}