How do you find vector equations of a line with two points?

Is it just like vector addition, using position vectors to find the line between the two points?|||If you have learned about directional derivatives, take the direction of the tangent * the directional derivitve of that point to find the vetcor.|||ax + by = c =%26gt; y = -ax/b + c/d





M1(x1; y1 = -ax1/b + c/d ) ; M2(x2; y2 = -ax2/b + c/d)





vector M1M2 = (x2-x1, y2-y1)