Functions

Functions

Introduction

A function describes a relationship between inputs and outputs. Functions can represent many everyday situations, such as the relationship between the number of items purchased and their total cost.

Imagine a bowling alley charging $8 per game. The total cost depends on the number of games played.

For 1 game, the total cost is $8. Two games cost $16, three games cost $24, and four games cost $32. Here, each number of games corresponds to only one total cost.

This relationship is a function. A function is a relation in which ea...