Motor Care Watch (MCW) performed a study using 10 cars to determine the relationship between the age of a car in years (X) and its monthly maintenance cost in K (Y).

Calculations performed on the data gave the following results:

X= 169; Y= 130; X²= 3856; Y²=2370:XY= 3006.

i). Determine an appropriate regression model.

ii). Calculate and interpret a measure of the strength of the model.

iii). what is the likely maintenance cost of a 6-year-old car?