1. Suppose for some firm, 14 units were sold at the initial price of $33 and after the price rose, 10 units were sold at the new price of $39. Compute the price elasticity of demand and interpret the result.

2.Returning to your computation in #1, will revenue have increased or decreased as a result of that price change? On the basis of this information do we know enough to assess whether the price change was a wise decision for the firm? Explain.

3. Ben purchased 12 gallons of gasoline each day. When the price of gasoline was $2.80 per gallon, Ben purchased 12 gallons of gasoline. When the price of gasoline fell to $2.10 per gallon, Ben purchased 12 gallons of gasoline. Use price elasticity of demand to describe Ben's demand for gasoline. What does Ben's demand curve for gasoline look like?