Answer:
 the income elasticity of demand is 0.7
Step-by-step explanation:
The computation of the income elasticity of demand is shown below:
As we know that 
Income elasticity of demand is 
= Percentage change in quantity demanded ÷ Percentage change in income 
= 7 ÷ 10
= 0.7
hence, the income elasticity of demand is 0.7
The same is relevant