Want a fun way for students to graph? Try using Doodle Buddy or really any of the million drawing apps available for the iPad.
Start by going to google images and typing in graph paper.
Find a grid that you like, hold your finger down on the image and save the image.
In the drawing program insert the graph paper as the background.
What is fun about doodle buddy is it has stamps that students can use for plotting the points.
Student then save the image to their camera roll and turn that in. (I have them post it to their wordpress blog).