[b]Directions:[/b][br]1) Click the "New Problem" button.[br]2) Determine the slope of the line.[br]3) Enter this slope as a ratio in the white text-box provided. After doing so, click "Check Answer".[br][br]4) [color=#ff00ff][b]If you enter a correct ratio, you'll see a big "Correct!" sign appear. [/b][/color] [br] If your ratio is not correct, keep trying until you're able to enter this slope correctly. [br][b][color=#ff0000] Repeat steps (1) - (4) till you get 20 correct answers in a row![/color][/b]