(2,-5) move up three steps is (2, -2). if you draw it on a paper(and draw lines to connect them), you can see that they form a right triangle. apply a²+b²=c² and you should get 3²+2²=(√13)²
D is distance which is 72 meters time represents seconds which is 12 so ratio is 12:72 reduce to get 1:6 time over distance would be 1/6 every second Eddie runs 6 meters so t= d/6 or 6t=d