What is the largest value of x that would make the following list of a points not a function.

{(___,
14
14), (
7
7,
17
17), (
19
19,
21
21))

The largest value of x that would make the given points list not a function is 14.

Since there are two points with x = 14, (14, 14) and (14, 17), this violates the definition of a function which states that each input can only have one output. Therefore, the largest value of x that would make the list not a function is 14.