Great set of 9+ worksheets that cover everything about Functions. All worksheets are double sided and a few come with answer keys. There is a test/quiz included with a answer key. The first is a f(x) where students determine if it is a function, then find f(3), and f(g(3)) types of problems, there is also a review sheet. The second covers operations, adding, subtracting, multiplying and the composition, and there's a review worksheet too. The third is everything students need to do for the inverse functions, and a review sheet. This also comes with my lesson plan. The fourth is domain and range with [ ] & ( ) notation, which comes with an answer key. The fifth is a review double sided worksheet that is hard, and that comes with an answer key also. Then, there's the sixth worksheet which is an easier review. The seventh has students interpret functions from graphs. The eighth is another review. Finally, the ninth is the test/quiz with an answer key. This is a very very good set of worksheets and covers everything students need to know about Functions. My whole department uses them for various classes. Please, check out my other sets of worksheets.