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Regression
Function
The equation of the least
square fit line through the data, used to estimate values of the dependent
variable (the Y axis) for given values of the independent variable (the
X axis).
Note: Caution should
be exercised in extrapolating the regression line beyond the region of the
data.
where  1
(the slope) and 0
(the intercept) are calculated as follows:
where N is the total number
of observations, x-doublebar and y-doublebar are the Averages
of x and y, respectively, and  x
is the Sample Sigma of x.
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