Question

How do you determine if (-1, 2), (-1, 3), (2, 4) is a function?

Answer 1

`(x,f(x)) in {(-1,2), (-1,3), (2,4)}` is not a function since There is more than one value for `f(-1)`

Explanation:

By definition a single value in the domain of a function may only map into a single value in the range.
`f(-1)rarr2` and `3`