What Is a Foreign Key

question 253

Multiple Choice

What is a foreign key?

• A) A field (or group of fields) that uniquely identifies a given entity in a table
• B) A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship among the two tables
• C) Characteristics or properties of an entity
• D) A field (or group of fields) that uniquely identifies a given attribute in a table

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Definitions:

Price Elasticity

Evaluates the responsiveness of product demand to variations in its market price.

Demand Function

A mathematical representation showing the quantity of a good or service consumers are willing and able to purchase at different prices.

Tickets

Official documents or electronic codes that grant the holder permission to enter an event, travel on a vehicle, or participate in a particular activity.

Price Elasticity

A measure of how much the quantity demanded of a good responds to a change in the price of that good, indicating the sensitivity of demand to price changes.