When we want to find the equation of a line we can use: [tex] Y-Y_1 = m(X-X_1)[/tex] or [tex] Y = mX + B[/tex] My question is aren't both equations essentially the same? For equation 1. If I know two points that the line passes through just by plugging and chugging won't that lead to what the Y intercept is? For example I have these two points that a line passes through: (2,12) & (6,0). by looking at the graph I know that the line has a Y intercept, even though it is not drawn. When I use equation one my constant (B) the Y intercept is 0 even though it should not be. What the heck am I doing wrong?