Question

Is the relation {(0,2), (5,2), (-2,5), (3,4)} a function

Answer 1

Yes. Each x value has one or no y values. Therefore it is a function

Answer 2

Good work.

Answer 3

I actually tried to make the function in my head.

Answer 4

The discrete points listed are not enough to make a function equation. However, when given points like this, look at the x values. If there are repeated x values, then the set is not a function.