Question

What is the domain of this relation? (-3, 2), ( 2, -4), (2, 6), (-3, -5), (0, -3)

Please tell me someone knows what they're talking about here?!

Answer 1

domian is the x

Answer 2

range is the y

Answer 3

So do I find the most common x factor?

Answer 4

Each of the given coordinate pairs (points) has an x-value and a y-value, an input and an output.

Make a list of all the input values (x-values). That set is your domain in this particular case.
Make a list of all the output values (y-values). that's you range in this particular case.

"domain" is (in general) not just x-values; specifying a domain often involes specifying RESTRICTIONS on what the values x can have. For example, the domain of

\[y=\sqrt{x}\]

Answer 5

is restricted; only zero or positive x values are allowed.

Answer 6

"most common x factor" has no relevance here.

Again, please identify all of the x-values (input values) of this relationship. (List them)

Answer 7

Input values are -3, 2, 2, -3, 0

Answer 8

@skullpatrol

Answer 9

Good list. Notice that '2' shows up twice in your list, with a different y value each time. This is a clear indication that your relationship is not a function.

In writing the domain, don't list '2' twice, and don't list '-3' twice either. Instead, write the domain as {-3, 0, 2).