Answer:
function
Step-by-step explanation:
Utility depicts the satisfaction that a user gets in consuming a good or service. It can be in the form of form, time, possession and place.
Utility function is used to measure how a user behaves when they receive or consume a product or service relative to how they behave when they receive other products/services. It is a widely used tool for measuring users' preferences over a series of products/services. It can be thought of as a map that connects each possible bundle of service to the corresponding utility that a person will get from consuming it.
With utility function, companies can track the way their products/services are being viewed by consumers thus allowing them to make logical business decisions.