Type what your Slope (M) and Y-intercept (B) is in number form and it will draw a line. LETTERS DON'T WORK!!! If you put the y-intercept as greater than 179, it wont work.
Update: I changed it from Y=KX+B (The way I learned it) to Y=MX+B because many people learned it that way and were confused by the K. Also, the scale units are very small so 5 looks like 0, and so on.
