Find the Jacobian of the transformation. 
Definitions:
Tennis Balls
are small, fluorescent colored balls covered with felt, used in the game of tennis.
Market Demand Curve
A graphical representation of the quantity of goods demanded at different prices by all consumers in the market.
Export Demand
is the desire and willingness of foreign buyers to purchase goods and services from a country, influenced by factors such as price, quality, and exchange rates.
Elastic Demand
A situation in which the demand for a product or service greatly changes in response to a change in price. High price sensitivity.
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