00:01
If we have the ordered pairs 1, 4, 2, 4, and 3, 4, and 3, 4, this relation, which is a set of ordered pairs, is a function, or is it not a function? that's what we're trying to figure out.
00:21
So let's take a look at the domain values, right, which is our x's.
00:25
That's 1, 2, and 3, and the range values, which are all of the ys, with 4, 4, and 4.
00:33
For this to be a function, each number in the domain has to be unique.
00:39
And we see that that is the case...