In this lesson, students explore the relationship between points with opposite coordinates and develop strategies for finding vertical and horizontal distances in the coordinate plane. Students begin by plotting points in one of the four quadrants. By comparing the coordinates of points in the different quadrants, students generalize patterns about their signs (MP8). Next, students explore points where the - or -coordinates are opposites and see that they are also reflections across the - or -axis. Then students develop strategies for finding the distance between two points where the coordinates may not be integers.