Answer the question based on the following

Price Per Unit. Quantity Demanded Per Unit of Time

$20 12

18 17

16 20

14 24

12 30

10 36

8 40

6 44

4 48

What is the price elasticity of demand over the range of $6 to $8?

A) 3

B) 0.33

C) 1.38

D) 0.47