1. Draw two vertical straight lines on the picture with a ruler and pencil. These two straight lines are the coordinate axes.

2. Determine the starting point and ending point of the coordinate axis, usually taking integer values, for example, the horizontal axis is from -5 to 5, and the vertical axis is also from -5 to 5.

3. Mark the scale on the coordinate axis. Usually, each small grid represents a unit length.

4. According to the requirements of the topic, mark the coordinates of each point on the coordinate system. Connect these points with straight lines and draw the required figure.