Question

A company produces electric motors for use in home appliances. One of the company’s
managers is interested in examining the relationship between delivery costs in a month and the number of motors produced that month that were returned by dissatisfied customers (Y).

Write a simple linear regression equation using the given data. Write, also, the equations theoretically used for the evaluation of the equation constants.

Month	Delivery cost (k$) X	Motors_Returned Y
1	43,55	67
2	55,83	64
3	48,53	65
4	48,55	65
5	69,29	65
6	64,39	64
7	58,32	64
8	76,90	67
9	65,98	64
10	43,44	67
11	41,50	67
12	55,07	64
13	60,74	64
14	41,06	68
15	64,58	64
16	70,22	65
17	68,25	65
18	50,93	65
19	76,35	67
20	43,93	67
21	60,25	64
22	42,22	67
23	79,18	68
24	66,63	64
25	79,67	68
26	52,79	65
27	50,58	65
28	66,86	64
29	42,95	67
30	62,45	64
31	42,73	67
32	78,45	67
33	74,49	66
34	62,68	64
35	74,41	66
36	42,41	67

Answer 1