Bardi Trucking Co., located in Cleveland, Ohio, makes deliveries in the Great Lakes region, the Southeast, and the Northeast. Jim Bardi, the president, is studying the relationship between the distance a shipment must travel and the length of time, in days, it takes the shipment to arrive at its destination. To investigate, Mr. Bardi selected a random sample of 20 shipments made last month. Shipping distance is the independent variable and shipping time is the dependent variable. The results are as follows: Shipment Distance (miles) Shipping Time (days) Shipment Distance (miles) Shipping Time (days)
1 815 7 11 840 4
2 611 3 12 745 5
3 600 6 13 803 9
4 769 7 14 634 9
5 851 5 15 819 4
6 810 4 16 856 15
7 808 4 17 823 15
8 671 8 18 788 7
9 745 4 19 805 15
10 725 7 20 725 12