The oblique equation of a straight line:

$$ y= k x + b $$

K is the slope of a straight line and B is the intercept of a straight line on the Y axis

This equation is called the oblique truncation equation of a straight line, abbreviated as the oblique truncation equation.

The straight line is not perpendicular to the x-axis, that is, the slope exists, and the inclination angle of the straight line is not 90 degrees.