Did I do this right?
If the following defines a one-to-one function, find its inverse. If no, write "Not one-to-one."
answer: Not one-to-one because of
Algebra Help Inverse One-to-one - Damon, Friday, March 28, 2008 at 5:34pm
There is only one y for each x, so the original is indeed a function.
However the inverse has those two values of y for x is 4 so the inverse is indeed not a function.