Question: question 1 national scan inc sells ratio frequency inventory tags...

QUESTION 1

1. National Scan, Inc., sells ratio frequency inventory tags. Monthly sales for a 6-month period were as follows:

   Month:	Sales
   Feb	47
   Mar	51
   Apr	56
   May	59
   Jun	58
   Jul	63

   
   Disregard the demand pattern of the given time series, You are asked to use the time series to derive a trend equation. In order to derive the trend equation is F_t = a + bt, you have to compute several components to compute the values for the variables a and b. Answer the following questions pertaining to information that are relevant to deriving the trend equation.
   
   a) The Σty =
   
   b) The Σy =
   
   c) The value for the b (slope of the trend line) =  (in 3 decimal places)
   
   d) The value for the a (intercept of the trend line) =  (in 3 decimal places)