A Property Manager Wants to Estimate the Annual Costs of Window

Essay

A property manager wants to estimate the annual costs of window cleaning for a newly acquired office building. She collected the following information related to costs of the 10 properties she currently manages:
Σxi = 17,470 Σx 2 = 34,125,100, where x is the window surface (ft2)
i Σyi = 1,350,955 Σy 2 = 203,605,360,640 and Σxiyi = 2,635,901,696, where y is the
i cleaning costs
Determine a CER equation for the cleaning costs and the correlation coefficient.