Use the +1 button to add a random point in the rectangle [-1,1] x [-1, 1]. Points that fall inside the unit circle are colored in green, and those outside are colored in red. The +100 button adds 100 points at a time.
The line plot shows the fraction of points that fall inside the unit circle. As more and more points are added, this fraction converges to a number slightly above 0.75. What is that number?