Answer: The four variables which alter it are:
3. The disposable income.
4. Consumer preferences: tastes, preferences and fashion determine the behavior of the applicants regardless of prices or income.
Explanation:
Demand is the quantity of a good or service that the applicants are determined to acquire at a certain price and conditioned by a series of factors.
Individual demand is defined as the quantity and quality of goods and services that can be acquired by a consumer.