options nodate nonumber;
data mulreg2;
  input x1 x2 y;
cards;
107.0 18.4 7192.03
103.2 16.7 6919.52
101.5 15.5 6771.20
104.5 14.0 6409.46
105.9 15.0 6699.98
102.1 14.5 6447.48
102.3 15.2 6864.32
 96.2 13.6 6406.42
103.8 16.0 6909.09
108.3 16.0 6752.56
115.4 18.2 7873.90
114.2 18.3 7739.60
110.8 18.0 7620.47
119.0 22.0 8832.30
110.2 17.5 7667.70
116.0 18.5 7602.86
110.5 19.0 7835.58
113.5 18.5 8032.60
107.5 16.0 7007.70
103.8 14.6 6553.40
109.4 15.0 7145.00
112.0 18.7 7682.05
101.5 14.8 6673.80
112.9 17.8 7570.50
108.5 16.0 7801.20
119.5 21.5 8465.14
105.0 15.6 6816.30
107.5 15.8 7225.50
110.6 16.0 6952.50
106.4 14.5 6986.25
;