Now, back to Elvis. I noticed when playing fetch with Elvis that he uses the third
strategy of jumping into the lake at D. It also seemed that his y values were roughly
proportional to the x values. Thus, I conjectured that Elvis was indeed choosing the
optimal path, and decided to test it by calculating his values of r and s and then checking
how closely his ratio of y to x coincided with the exact value provided by the
mathematical model.