If 
represents the library charges on b books that are w weeks overdue, explain in practical terms the meaning of 
.
Definitions:
Inelastic
Describing a situation in which the demand or supply of a good or service is relatively unresponsive to changes in price.
Demand
The amount of a product or service that customers can and are willing to buy at different price levels over a specified time.
Supply
The total amount of a product or service that is available for purchase at any given price.
Inelastic
Describes a situation where the demand or supply of a good or service is unaffected by changes in price.
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