> Exactly so. I'm still stuck on the 6th grade > explanation, for which I still have a hard time > understanding the OP's difficulty. > > Tom
It's not my trouble at all. When I learned functions I was originally told it was a machine and said, "Well, no shit, that works well.". The problem is the student's understanding of how to explain what a function is to her students, who happen to be sixth graders.