We recently noticed that there are a lot of graphs and charts on the Social Studies section of the HSE exam.  We should be giving students practice with graphs and charts in our reading/writing and math classes. This supply and demand graph from the CUNY HSE Math Curriculum Framework* gives you an opportunity to discuss economics and systems of equations (though this isn’t required to explore the graph).

* p. 110 The Price of Math Books, Supplemental Problem (Unit 4: Systems of Equations)