This document is a guide for a 10th grade mathematics class. It provides an overview of the topics that will be covered in the first period, including linear functions, increasing and decreasing functions, linear and affine functions, graphing, slope of a line, line equations, and solving systems of linear equations graphically. It then provides more detailed explanations and examples of concepts like the definition of a function, domain and range, and how to determine if a function is increasing, decreasing or constant by examining its graph. It concludes with practice problems and homework for students.