data p119;
 input Y X;
cards;
8.11 0 
11.00 5 
8.20 15 
8.30 16 
9.40 17 
9.30 18 
9.60 19 
10.30 20 
11.30 21 
11.40 22 
12.20 23 
12.90 24 
;
run;