Answer:
The answer is
Income inelastic
The chocolate is a normal good.
Step-by-step explanation:
First lets find the percentage increase or decrease in income and demand.
For income:
($2,200 -$1,800)÷$1,800
=$400÷$1,800
=0.2222 or 22.22%
For the demand
(21cups-19cups)÷19cups
=0.1053 or 10.53.
A 22.22% increase in income leads to 10.53% in demand of hot chocolate. This means it is less proportional. The demand is less sensitive to his income.
The hot chocolate is a normal good. If not an increase in income would have resulted to a lower demand for hot chocolate.