RT  附上我的程序：
data practice07_17;
input x1 x2 y;
cards;
108.28 1484.10 17.05
152.36 750.33 16.59
95.04 766.42 10.91
65.45 1110.46 14.14
62.97 1031.29 9.52
;
proc print;
run;
proc reg data=practice07_17;
run;
quit;