This document provides a lesson on slope-intercept form of a line. Slope-intercept form is represented by the equation y = mx + b, where m is the slope and b is the y-intercept. Given the slope and y-intercept, you can write the equation of the line and graph it. You can also determine if a given point lies on the line by plugging it into the equation - if the left and right sides are equal, the point is on the line. The lesson explains how to identify the slope and y-intercept from an equation, write the equation given slope and y-intercept values, and check if points are on lines.