these are three equations for a line segment.

slope y-intercept form is fairly simple you have slope which is M and y-intercept which is B and then your X and Y coordinates. General form is just meant to be “pretty” as in it’s supposed to just present the equation in a neat way. point slope form is an equation that is faster to solve than slope y-intercept form, you just have to find the slope and then input the first X and Y coordinate from the slope equation