how to calculate the coefficient of correlation between age of cars and annual maintenance cost and comment

Question : Calculate the coefficient of correlation between age of cars and annual maintenance cost and commentAge of cars (years)246781012Annual maintenance cost(Rupees)1600150018001900170021002000Solution:Let’ denote Age of cars by x and Annual maintenance cost(Rupees) by y.xyX=x-mean(x-series)Y=y-mean(y-series)XYX^2Y^2 21600-5-20010002540000 41500  -3  -300    900    9   90000 61800  -1    …

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