Create a series of rules, such as multiply by 4, add 3, etc. Have a series of partially completed charts following those rules. There are a few ways you can use these: * Display all charts at the front of the room, hold up a rule, and the class needs to figure out which chart it goes with. * Display the rules and hold up a chart for them to match. *Have them complete a graph in small groups, with or without the rule. *Give small groups a chart and have them determine the rule and complete.