# Good learning resources on what kinds of propositional information one can communicate through graphs?

I am taking an Economics class. We are required to plot and interpret 2D graphs. But often we have to use oddly shaped functions or have additional constraints we have to impose that make interpreting the graph tricky.

I am used to working with words and theorems to prove things. But my professor wants me to be able to articulate economic insights largely using visualization and let the graphs speak for themselves to some extent.

Are there any resources that can explain what kinds of information usually expressed using words can be communicated visually using graphs?

• Could you provide a "tricky" example (or a link to an example)? I am having difficulty imaging that interpreting an economics chart is more difficult than thinking about "$n$-dimensional situations." – Joseph O'Rourke Apr 14 '15 at 20:58
• @JosephO'Rourke I have thought about and updated the question to clarify what information I am looking for. I think the newer version may be more clearly answerable. – Stan Shunpike May 17 '15 at 4:25