The fatigue curve in logarithmic coordinates [FORMULA NOT REPRODUCIBLE IN ASCII] has a shape of the straight line, then:

2] were determined using logarithmic coordinates [FORMULA NOT REPRODUCIBLE IN ASCII] (Fig.

Multiple linear regression is chosen for the mathematical modeling of the intensity depending on the cutting regime parameters in logarithmic coordinates.

Intensity function in logarithmic coordinates, determined by the working environment MathCAD is the following:

Expression of intensity function I, in logarithmic coordinates, determined using MathCAD program is as follows:

Plotting experimental data in the form of dimensionless groups on

logarithmic coordinates, representing the plotted values by a straight line, and thereby inferring an algebraic correlating equation in the form of a power-law have been characteristic practices in chemical engineering for over a century.

Accuracy plotting the curve and the associated straight line in the

logarithmic coordinates depends on the size of the steps in the denominator values, which can be entirely random but must be on the relevant hyperbola in terms of X.