From the data shown in Table below about demand, calculate the price elasticity of demand from: point B to point C, point D to point E, and point G to point H. Classify the elasticity at each point as elastic, inelastic, or unit elastic.



Points P Q
A 80 4,000
B 90 3,800
C 100 3,600
D 110 3,400
E 120 3,300
F 130 3,000
G 140 2,900
H 150 2,693