The past days in class, we have talked about what it means to be a function. Functions and the way we write functions will be important to use in this class. If you want to see a few more examples of functions, check out this video.

We will use “function notation” which is a way to say, “the way we write a function.” You may be familiar with y=2x+5, in this class we will be using f(x) = 2x+5 which means the same thing as “y” and is called function notation.

https://www.khanacademy.org/math/algebra/algebra-functions/evaluating-functions/v/what-is-a-function