Linear Regression Challenge Game

Try to "Draw" the line of best fit by dragging the blue line over the data. You will see a Score. The closer to 100 you get, the closer you are to the least square regression ("how the computer does it") line. Click the Red Text to show the "Answer" and click generate to try a new randomized set of data.
www.mrhosey.com...
or directly
www.desmos.com...