Two points determine a line. However, using at least three points to graph a line is recommended. This is because the third point will serve as a means to verify the accuracy of the line.
Work Step by Step
Two points determine a line. Thus, to graph a line, a minimum of two points are needed. A line can be graphed by plotting two points that belong to the line and then connecting the two points using a straight line. However, when we are graphing by hand, we often put the points in the wrong places. Thus, a third point helps as it can help us improve the accuracy of the line.