Scenario 5-3
​
Suppose the Demand Function for Good X $$Q _ { d x } = 15 - 0.5 P _ { x } - 0.8 P _ { y }$$

Short Answer

Scenario 5-3
​
Suppose the demand function for good X is given by:
$$Q _ { d x } = 15 - 0.5 P _ { x } - 0.8 P _ { y }$$ where
$$Q _ { d x }$$ is the quantity demanded of good X,
$$P _ { x }$$ is the price of good X, and
$$P _ { y }$$ is the price of good Y, which is related to good X.
-Refer to Scenario 5-2. Using the midpoint method, if the price of good Y is $10 and the price of good X decreases from $5 to $3, what is the price elasticity of demand for good X? Is the demand elastic, unitary elastic, or inelastic?