Hi I have a graphing question and I'm not sure what method I should start with to solve it: The math department needs to schedule 6 classes. 10 students have indicated the courses that they plan to take. What is the minimum number of time periods per week that are needed to offer these courses so that every two classes having a student in common are taught at different times during a day. Two classes having no student in common can be taught at the same time. Each class has 1 lecture per week.
