This document serves as a comprehensive review for the final exam in a Discrete Mathematics course. It covers various topics including absolute value equations, linear functions, graphing practices, and systems of equations. The review provides step-by-step instructions on how to solve absolute value equations by isolating the expression and splitting it into two cases (positive and negative). It also encourages practicing linear equations and inequalities by identifying key characteristics such as slope and y-intercept and involves graphing these equations. The document further outlines methods for solving systems of equations by both graphing and substitution, and includes sections on graphing absolute value functions as well as determining their vertices. Each section contains practice problems that students can work through to solidify their understanding.