Service Engineers Demand Forecasting

A company which markets and repairs small computers needs to forecast the number of service engineers required over the next few years. This requires consideration of the length of service calls, which in turn depends on the number of components that need to be repaired or replaced. The MLR input data given below consists of the number of component parts repaired and the length of the service call (in minutes) for a random sample of 24 calls. Explain the relationship between the length of service call (response variable) and the number of repaired units (predictor variable) with a simple regression model.

2 24
#Parts  Minutes
1       23
2       29
3       49
4       64
4       74
5       87
6       96
6       97
7      109
8      119
9      149
9      145
10     154
10     166
11     162
11     174
12     180
12     176
14     179
16     193
17     193
18     195
18     198
20     205

Source

To MLR