# x1 = customer orders (in thousands) # x2 = add-delete items (in thousands) # y1 = CPU times (in hours) # y2 = disk input/output capacity x1 x2 y1 y2 123.5 2.108 141.5 301.8 146.1 9.213 168.9 396.1 133.9 1.905 154.8 328.2 128.5 .815 146.5 307.4 151.5 1.061 172.8 362.4 136.2 8.603 160.1 369.5 92.0 1.125 108.5 229.1