Appendix
Welcome to the appendix! This section of your textbook functions as a resource for you to learn or refresh your memory on key concepts that are useful to this course, but not addressed directly. Unlike the chapters in units 1-4, these chapters will not have an introduction or any explicit application for your assignments in this course. We encourage you to use it often and ask your instructor any follow-up questions you may have. Think of it like google, but we did the work of finding the good stuff for you.