Davis Stores sells clothing in 15 stores located around the southwestern United States. The managers at Davis are considering expanding by opening new stores and are interested in estimating costs in potential new locations. They believe that costs are driven in large part by store volume measured by revenue. During a discussion, one of the managers suggests that number of employees might be better at explaining cost than store revenues. As a result of that suggestion, managers collected the following information from last years operations (revenues and costs in thousands of dollars):

Store	Costs	Employees	Revenues
101	$1,700	24	$5,393
102	3,709	41	4,689
103	3,219	26	2,793
104	5,089	54	6,192
105	4,393	44	5,649
106	2,782	26	5,147
107	1,825	34	5,923
108	4,760	45	4,025
109	6,075	47	2,639
110	4,364	29	4,599
111	3,869	42	4,897
112	6,318	58	2,412
113	2,380	28	3,820
114	4,583	36	2,317
115	2,754	26	2,926

d-1. Enter the regression coefficients.

d-2. Estimate the cost of a store with 42 employees using the results from a simple regression of store cost on employees.