And that's why you can never lose those last 5 lbs.

edit: That's a joke. hehe

 

Now THAT sounds like a reality show theme to draw high ratings.

 

 

 

Sounds more like an exponential decay, or asymptotic function. In which case you will never actually reach 140, you will just keep getting closer & closer. (Sorry I could not help myself, too much time spent helping my 11th grader with math homework.)