Question

What is the domain of this relation?

{ (-1,5), (4,1), (8,3), (4,5) }

Answer 1

The domain of a relation is the set of all x values in a set of ordered pairs.

In this case, just take all the x values. They are:

-1, 4, 8, and 4.

Of course, there are no repeats with domain values.

So the domain set would just be -1, 4, and 8.

Or the last choice,

{-1, 4, 8}

Answer 2

The answer is the one with all of the x values listed. {-1,4,8}