The following table is a function, but its inverse is not a function.
[math]
[math]
[math]
[math]
[math]
[math]
[math]
[math]
[math]
[math]
There is an output value of [math] that is causing the inverse [math] to not be a function.
Which output value is the problem?
How is that output value of [math] causing the inverse to not be a function?

Hint:

Solution: