Give two examples of revenue sources for state government.

When speaking about revenue sources within state governments, I would say that it would likely be property taxes and sale taxes. That's a good way for a state to make their average revenue. Even tax on trade, if you look at it? There are several ways the state governments can generate revenue. It's just a matter of finding one that does so.

the answer would be voluntary exchange -

"the act of buyers and sellers freely and willingly engaging in market transactions. moreover, transactions are made in such a way that both the buyer and the seller are better off after the exchange than before it occurred."

hope this : )

-shy