User's Guide

Logarithmic Regression Calculation (y=a+b･ln(x))

Commands

With logarithmic regression, regression is performed in accordance with

the following model equation.

y = a + blnx

The following is the calculation formula used for each command.

• Summation Sub-menu, Variable Sub-menu, Min/Max Sub-menu, and

Regression Sub-menu operations are the same those for linear

regression calculations.

Logarithmic Regression Calculation Examples

Select logarithmic regression and input the following data (Statistics: Off)

x y

29 1.6

50 23.5

74 38.0

103 46.4

118 48.9

(Select Type) (y=a+b･ln(x))

29 50 74 103 118