(a) You are given the following trend equation by the method of least squares of a ´company selling readymade garments : Y = 480 + 36 X Origin 1988 X= Unit of one year Y = number of units sold per...

Extracted text: (a) You are given the following trend equation by the method of least squares of a ´company selling readymade garments : Y = 480 + 36 X Origin 1988 X= Unit of one year Y = number of units sold per year (i) Convert the above trend equation into a monthly trend equation; and (ii) Estimate the sales for the month of Oct. 1994.