Final answer:
The domain of the relation R is {−4, 8, 5, 1}.
Step-by-step explanation:
The domain of a relation is the set of all possible input values. In this case, the relation R is given as {(−4, 8), (8, 10), (5, 4), (1, 6), (5, −9)}. To find the domain, we need to list all the x-values from the given ordered pairs.
The x-values are: −4, 8, 5, 1. Therefore, the domain of the relation R is {−4, 8, 5, 1}.