### Home > AC > Chapter 11 > Lesson 11.3.1 > Problem 11-100

11-100.

A function can have only one output value (*y*) for each input value (*x*).

It is not a function because there are 2 *y*-values for at least one *x*-value.

It is a function.

It is a function.

It is not a function because there are 2 *y*-values for at least one *x*-value.