6. The scatterplot shows a third variable as well: Region of the world. One way to depict a categorical variable on a scatterplot is using different colors or shapes for different categories. The code is given in the top right, and is categorized as follows: 9 1 = Latin America 8 2 = Western nations 7 3 = Middle East 6 4 = Sub-Saharan Africa 5 5 = South Asia 4 . 6 = East Asia 3 7 = former Communist countries 2 0 2 4 6 8 10 Ecological Footprint Discuss one major observation of an association between region and the two quantitative variables. (3 points)