The domain of the following relation: R: { (-4,8), (8,10), (5,4), (1,6), (5,-9) } is

{-4, 8, 5, 1, 5}

Step-by-step explanation:

In a set of ordered pairs, the domain is the set of the first number in every pair.

If the set of ordered pairs is { (-4,8), (8,10), (5,4), (1,6), (5,-9) },

the domain is { - 4, 8, 5, 1, 5}