Paleontologists study prehistoric life, such as dinosaurs. They study fossils in a variety of ways. The following graph shows data taken from the Dinosaur Project, displaying humerus length and femur length for Ceratopsian (horned) dinosaurs and Thyreophoran (the group including Stegosaurs and Ankylosaurs) dinosaurs. Examine the graph to consider the extent to which the length of the two bones for these dinosaurs are related. Graph of Limb proportions in Ceratopsians and Thyreophorans. The horizontal axis is labeled Femur Length and the vertical axis is labeled Humerus Length. The two types of dinosaurs are indicated by different colors of points. The points on the graph are scattered from the lower left corner to the upper right corner. Part A: The relationship between Femur Length and Humerus Length is: Positively correlated Negatively correlated Part B: The relationship is stronger for which class of dinosaurs? Ceratopsians Thyreophorans