slope-intercept equation of a straight line: y=kx+b

k is the slope of the straight line, b is the intercept of the straight line on the y-axis

this equation is called the slope-intercept equation of a straight line, or the slope-intercept equation for short.

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°.