Table 52 Shows the Change in the Quantity Demanded for Good

Multiple Choice

Table 5.2 shows the change in the quantity demanded for Good A and Good B as a result of the change in their price. Use the information in the table below to calculate the price elasticity of demand for Good A.​ Table 5.2
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Quantity
Price
Good A
​
100
$10
120
​
$ 9
Good B
200
$20
140
$35

A) −5/2
B) −11/3
C) −3/10
D) −10/3
E) −19/11