Suppose That When the Price of a Good Is $15 $- 5 / 6$

Multiple Choice

Suppose that when the price of a good is $15, the quantity demanded is 40 units, and when the price falls to $6, the quantity increases to 60 units. The price elasticity of demand near a price of $6 and a quantity of 60 can be calculated as:

A) $- 5 / 6$
B) $- 2$
C) $- 2 / 9$
D) $- 9 / 2$