Jim = 3 x Charles and Charles = 2/3 Bob, but Bob has 27, that means that Charles = 2/3 (27) = 18 Books. So if Charles has 18 books, Jim has 3 time more that is 18 x 3 = 54
Slope = ------------------------ 6 - 6 = 0 15 - (-1) = 16 0 / 16 = 0 -------------------------------- You have a slope of 0, meaning that this is a straight horizontal line