**Learning Target:** Identify and understand what a function is.

**Handouts:** Intro to Functions (Turn in: Tues, 11/28)

Today we learned a new concept, functions. A function is a relation where every input gives you exactly one output. Within each function is a rule, so when you put a value into the rule, you get an output.

The example I showed you in class was a website with an interactive function machine. You input a value and it gives you the output. You have to figure out what the function rule is!

Here are the notes that we took in class:

Notice that we think of tables for functions a little differently than we did for tables of linear relationships. Instead of finding the rise and run for the rows in the table, we look at each x value and try to determine the rule that gets its corresponding y value. Also, remember that the definition of a function is a relation where each input has exactly one output. That means if you put the same input into the function, you should get the same result both times. If not, then it is not a function!

In class, you should have finished #1-5. You will turn this in on Tuesday 11/28.

On Monday, you will go directly to the library for math class because we are taking an assessment on the computers! It will not affect your grade, but it will give you a chance to show what you have learned so far!

Have a great Thanksgiving break!