This document discusses linear equations and graphs. It defines a linear equation as y = mx + c, where m is the slope and c is the y-intercept. It explains how to calculate the slope using two points and how to find the y-intercept and x-intercept by setting y = 0 and x = 0 in the linear equation. Several examples are given of finding the linear equation from a graph or given information. Practice problems are also provided to find the linear equation of lines on a graph.