## The last data set is "DrinksData".  A soft drink bottler is analysing
## vending machine service routes in his distribution system, and is
## interested in predicting the amount of time required by the route
## driver to service the vending machines in an outlet.  The industrial
## engineer responsible for the study has suggested that the two most
## important variables affecting the delivery time are the number of
## cases of product stocked and the distance walked by the route driver.
## The engineer has collected the 25 observations below on delivery time
## (minutes), number of cases and distance walked (feet).
## 
Time	Cases	Distance
16.68	7	560
11.5	3	220
12.03	3	340
14.88	4	80
13.75	6	150
18.11	7	330
8	2	110
17.83	7	210
79.24	30	1460
21.5	5	605
40.33	16	688
21	10	215
13.5	4	255
19.75	6	462
24	9	448
29	10	776
15.35	6	200
19	7	132
9.5	3	36
35.1	17	770
17.9	10	140
52.32	26	810
18.75	9	450
19.83	8	635
10.75	4	150