data Example; input obs delivery cases distance; cards; 1 16.68 7 560 2 11.50 3 220 3 12.03 3 340 4 14.88 4 80 5 13.75 6 150 6 18.11 7 330 7 8.00 2 110 8 17.83 7 210 9 79.24 30 1460 10 21.50 5 605 11 40.33 16 688 12 21.00 10 215 13 13.50 4 255 14 19.75 6 462 15 24.00 9 448 16 29.00 10 776 17 15.35 6 200 18 19.00 7 132 19 9.50 3 36 20 35.10 17 770 21 17.90 10 140 22 52.32 26 810 23 18.75 9 450 24 19.83 8 635 25 10.75 4 150 title1 'Mathematical Sciences 805'; title3 ' Multiple Linear Regression Analysis'; proc reg; model Delivery = CASES DISTANCE / XPX I P CLI CLM ;