Q1. In May 2011, the average price of gasoline in the United States was $3.76 per gallon and consumers bought 5 percent less gasoline than they had during May 2010, when the average price was $2.79 per gallon. Based on these numbers, what was the price elasticity of demand for gasoline from May 2010 to May 2011?

Q2. The demand for good X is given by Qdx=1200-0.5Px+0.25Py+0.1M. Research shows that the prices of related goods are given by Py=5900, while the average income of individuals consuming this product is M=50000, indicate whether good X and Y are substitutes or complements, Is X an inferior or a normal good? How many units of good X will be purchased when Px=4910, determine the inverse demand function for good x.