Graphing Calculator Take Two

I tried using another graphing calculator activity in class today. It worked better, however I had to go step by step for almost every problem. Students were forgetting to put in a variable or forgetting to put in parentheses. Any minor problem that you could think of came up when the class was given some individual time to work. I will be trying this with my other two classes and hopefully it works a little better. This time I will try to simplify the equations I give them, and give them less problems to hopefully speed up the process.