When I taught my students how to write a function rule, I used this graphic organizer. It was really just an interesting way to organize the different problems instead of listing them down the page. There are 5 examples where students write the function rule from a table. Then, there are 2 examples that are word problems.
On another note, my students have been really starting to decorate their notebook pages. These two examples are my students notebooks that they decorated while I was teaching the lesson. I love that they are making it their own!