Tax Graph

This is from my good political nemesis Eric D. The Riddler to my Batman. The Liz Lemon to my Jack Donaghy.

So, what's your input? What does this mean?

I have a question. What income puts one the top marginal tax rate? What does "marginal" mean?

Ask and ye shall receive. Check this out:

http://www.econlib.org/library/Enc/MarginalTaxRates.html