There are so many advertisers on TV trying to get you to buy their cell phone plans. How do you decide which cell phone plan will be more cost effective? This activity will try to help you decide the answer to this question. As you make your through this activity, it will improve your algebraic skills by reinforcing the theory of graphing data, generating equations, creating data tables, defining variables, and formulating a conclusion for each of your students. The “cell phone plan” activi