Sentry Industries CA756 - Manual (Page 51)

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Exponential regression
• The regression formula is y = A•e B•x (Iny = InA + Bx).
Enter the y data as the logarithm of y(ln), and the x data
the same as that for linear regression.
• Estimated values , and based on the regression
formula can be calculated using the following formulas:
• Correction is performed the same as in linear regression.
Constant term A is obtained by ,
estimated value is obtained by x
, and estimated value is obtained by y
.
∑
y,
∑
y 2 and
∑
xy are obtained by
∑
Iny,
∑
(Iny) 2
and ∑ x•Iny respectively.