Have you ever priced a graphing calculator? Those things are outrageous. It occurred to me one day that they are almost as expensive as a cheap laptop. Why hasn’t someone figured out an app for that already? Turns out I was a little slow on the uptake, someone already had! Enter Desmos. It is a free app that you can use on your smart phone that IS a graphing calculator! It is also available with other functionality on the demos website. You can open an account and save projects and even create a teacher account and create activities for your students. To try it out go to Desmos.com. For the record I am in no way affiliated with Desmos and do not receive any compensation for promoting it.
Why spend the big bucks when you can get a graphing calculator for free?! Have fun graphing!