Math Problem Statement
Amy has recently received a 25% increase in salary and decided to order more from DoorDash, from the original 3 times a month to 10 times a month. Holding all else constant, calculate Amy's income elasticity and determine if DoorDash service is considered a normal good or an inferior good.
Question 16 options:
The income elasticity is 233.33, and DoorDash service is considered an inferior good.
The income elasticity is 9.33, and DoorDash service is considered a normal good.
The income elasticity is 9.33, and DoorDash service is considered an inferior good.
The income elasticity is 233.33, and DoorDash service is considered a normal good.
Solution
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Math Problem Analysis
Mathematical Concepts
Income Elasticity of Demand
Percentage Change
Normal Goods
Inferior Goods
Formulas
Income Elasticity of Demand = (% Change in Quantity Demanded) / (% Change in Income)
% Change in Quantity = (New Quantity - Old Quantity) / Old Quantity × 100
% Change in Income = (New Income - Old Income) / Old Income × 100
Theorems
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Suitable Grade Level
Undergraduate Economics or Advanced High School