This Problem Set is a part of the Lesson 1, Unit 3, Grade 6. Draw a number line, and create a scale for the number line in order to plot the points. a. Graph each point and its opposite on the number line. Explain how you found the opposite of each point. To graph each point, I started at zero and moved right or left based on the sign and number (to the right for a positive number and to the left for a negative number).