This Instructional Activity is a part of the Lesson 13, Unit 4, Grade 8. In the last lesson, we saw that the solutions of a linear equation in two variables can be plotted on a coordinate plane as points. The collection of all points in the coordinate plane so that each is a solution of is called the graph of Do you think it is possible to plot all of the solutions of a linear equation on a coordinate plane? No, it is not possible. There are an infinite number of values we can use to fix one of the variables. For that reason, we cannot draw the graph of a linear equation.