Connect points A and B. That makes a line parallel to the y-axis and perpendicular to the x-axis. Plot two more random points and write down their coordinates along with points A and B's coordinates. For number 5, it says that the point you need to write has to fall on line L with a y-coordinate greater than 20. Coordinates (x,y) y has to be greater than 20 and x has to be equal to 4. So (4, any number over 20) would work. For example: (x, 25) would be an appropriate answer to number 5. Hope this helps!
5.8