The two Hens & Rabbits applets represent the same problem in two different ways.[br][br]A farmer has 50 animals. Some are hens & some are rabbits. Among them they have a total of 140 legs. How many hens and how many rabbits does the farmer have? [br][answer 30 hens, 20 rabbits][br][br]One graphical representation of the problem shows the problem in the {animals, feet} plane and the other graphical representation shows the problem in the {hens, rabbits} plane.[br][br]Study the two representations carefully -[br][br]How are the numbers of rabbits and the number of hens represented in the {animals, feet} plane?[br][br]How are the number of animals and the number of feet represented in the {hens, rabbits} plane?[br][br]How are the quantities feet/rabbit and feet/hen represented in each of the two planes?[br][br]Which representation do you think provides you with more insight? Why?