Question

Determine which relation is a function.

{(–4, 3), (–2, 3), (–1, 2), (2, 5), (3, 2)}
{(–4, 1), (–2, 3), (–2, 1), (–1, 5), (3, 2)}
{(–4, 1), (–2, 3), (–1, 2), (3, 5), (3, 2)}
{(–4, 1), (–2, 3), (–1, 1), (–1, 5), (3, 2)}

Answer 1

A relation can be a function so long as the x coordinate is not repeated, however, the y coordinate may be repeated.

Apply this rule, and you will have your answer.

Answer 2

Explain a bit more? @LanguageEnthusiast

Answer 3

Okay.
You have coordinates.
Coordinates are written in the format of: \((x,~y)\)
For a relation to be a function \(x\) may not be repeated.

Answer 4

@NightmareNight
Do you understand?

Answer 5

Yes, thanks ^-^

Answer 6

Awesome :-).
Glad I was of help.