Another page has been sweated over: Function Transformation
Please check it. There are lots of up, down, left, right, compress in y, stretch in x, ... etc ... so I may have easily got one or two of them the wrong way round.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
Good page! I seem to be missing some cheese.
In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.
Why? Well imagine you are going to inherit a fortune when your age=25. If you change that to (age+4) = 25 then you would get it when you are 21. Adding 4 made it happen earlier.
Sorry, just being picky...
But all in all, it's a very fun page! It has great explanations and lots of examples. Great job!