The materials handling manager of a manufacturing company is trying to forecast the cost of maintaining for the company's fleet of over the road tractors. The manager believes that the cost of maintaining the tractors increases with their age. The following data was collected:

a. Using POM for windows least linear regression module, develop a relationship to forecast the yearly maintenance cost based on the age of a tractor.
b. If a section has 20 three years old tractors. What is the forecast for the annual maintenance cost?
 

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Age (years) Yearly Maintenance Cost (S) Age (years) Yearly Maintenance Cost (S) 4.5 619 5.0 1,194 4.5 1,049 0.5 163 4.5 1,033 0.5 182 4.0 495 6.0 764 4.0 723 6.0 1,373 4.0 681 1.0 978 5.0 890 1.0 466 5.0 1,522 1.0 549 5:5 987 Age (years) Yearly Maintenance Cost (S) Age (years) Yearly Maintenance Cost (S) 4.5 619 5.0 1,194 4.5 1,049 0.5 163 4.5 1,033 0.5 182 4.0 495 6.0 764 4.0 723 6.0 1,373 4.0 681 1.0 978 5.0 890 1.0 466 5.0 1,522 1.0 549 5:5 987