This is “Appendix A: Graphs in Economics”, appendix 1 from the book Principles of Microeconomics (v. 2.0) by Libby Rittenberg and Timothy Tregarthen. For details on it (including licensing), click here.
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A glance through the pages of this book should convince you that there are a lot of graphs in economics. The language of graphs is one means of presenting economic ideas. If you are already familiar with graphs, you will have no difficulty with this aspect of your study. If you have never used graphs or have not used them in some time, this appendix will help you feel comfortable with the graphs you will encounter in this text.