The Demand Function for a Certain Brand of Compact Disc

Short Answer

The demand function for a certain brand of compact disc is , where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Compute the elasticity of demand (to the nearest hundredth) when x = 15. __________
​Determine whether the demand is inelastic, unitary, or elastic when x = 15. __________