A good's demand is given by: P = 780 - 2Q. At P = 31, the point price elasticity is: Enter as a value (ROUND TO TWO DECIMAL PLACES).

A good's demand is given by: P = 286 - 3Q. At P = 197, the point price elasticity is: Enter as a value (ROUND TO TWO DECIMAL PLACES).

If Good C increases in price by 3030% a pound, and this causes the quantity demanded for Good D to increase by 40%40%, what is the cross-price elasticity of the two goods? Round your answer to one decimal place.

Suppose income increases by 25 percent and, as a result, the quantity of a particular brand of automobile demanded (holding the price for this particular automobile constant) increases by 39 percent. The income elasticity of demand for this brand of car is (Enter your response rounded to two decimal places and include a minus sign if appropriate.)