Find the derivative 
by solving the given implicit equation for y explicitly in terms of x. 
Definitions:
Income Transfer
The reallocation of money from one group to another through mechanisms like taxes, subsidies, welfare payments, or other social assistance programs.
Supply Curve
A graph showing the relationship between the price of a good and the amount of the good that suppliers are willing to sell.
Marginal Cost Curve
A graphical representation showing how the cost of producing one more unit of a good varies with the level of output.
Average Revenue
Total revenue from the sale of a product divided by the quantity of the product sold (demanded); equal to the price at which the product is sold when all units of the product are sold at the same price.
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