116 WORKING WITH SAMPLE DATA 8 7 Inflation Based on CPI 6 5 4 3 2 1 0 0 2 4 6 8 10 12 Annual Average 6-Month Treasury Bill Rates Figure 8.1. Scatterplot of the Annual Average 6-Month Treasury Bill Rates With Annual Inflation Based on the Consumer Price Index (CPI) The Least Squares Linear Regression Equation The direction and location of the cloud of points and the width of the point cloud depicted in the scatterplot are all important characteristics of