To Answer the Question,refer to the Following Table Showing a Demand

Multiple Choice

To answer the question,refer to the following table showing a demand schedule: $\begin{array}{llcc}\underline{ \text {Price } }&\underline{ \text { Ouantity } } \\ &\underline{\text {demanded }} \\\$200 &1000\\150&1400\\100 &1800\\\end{array}$ If price falls from $150 to $100,what is the elasticity of demand over this range?

A) -0.625
B) -1.0
C) -1.17
D) -2.5
E) -3.0