This activity encompasses graphing, writing equations, dependent/independent variables, explaining slope and y-intercept in context of the situation, and comparing multiple functions. Students are given a business scenario and have to use linear functions to analyze it. NO ANSWER KEY INCLUDED! Do not buy if you're looking for a product with a key! :-) Works great as a group activity, and when finished, I let my students actually make the little band bracelets, they loved it!