2.2 Introduction to Functions

We first introduce the definition of function.

Then we introduced function notation

Here is a worksheet for practicing function notation.

We then defined domain, and figured out how to find the domain algebraically.

And then we figured out how to find the domain and range from the graph.

Here’s a worksheet where you can practice finding the domain and range of functions. You may have to graph to find the range.

Then we defined increasing, decreasing, and constant.

Here are some extra problems and solutions for determining when something is increasing, decreasing, or constant.