Question

If the x-values repeat in a table, is it a function or not a function?

Answer 1

Explanation:

NOT a function because if we have two repeating x-values and two different y-values for the same x is not a function.

Think if two points stand on the same vertical line, is not a function.

Answer 2

Explanation:

x y

3 1

3 2

3 3

No this is not a function x values can only have 1 y associated with them.