This week, we were introduced to functions. In this blog post I am going to explain and give examples this lesson.

A function relates to an input, a relationship and an output. The input is the number we begin with, the relationship is the number or equation that we use to change the input and the output is the number we end with after we have implemented the relationship.

This table given demonstrates functions:

The input is related to X and the output is related to Y.

The relationship is multiply by two each time. You can see that you start off with the input number and you multiply it by two to receive the output.

It is not possible for a function to have two outputs. A function relates each number in a set with exactly one other number in a set. If it has two outputs, it still means that it is a relation but just a function.