The intercept formula of a straight line is a mathematical expression describing the intersection of a straight line and a coordinate axis. For the intersection of a straight line and the X axis, its Y coordinate is 0, and the X coordinate is called intersection.

Its x coordinate is 0, and its y coordinate is called the longitudinal intercept. The intercept formula of a straight line is: x/a+y/b= 1(a≠0, b≠0), where a is the transverse intercept and b is the longitudinal intercept. Formula is used to describe the position of a straight line on a coordinate axis, which is a concept in linear algebra and analytic geometry.