1. The problem statement, all variables and given/known data Use a vector solution to show that a scalar equation for the line through the points P1(x1,y1) and P2(x2,y2) is y-y1/x-x2=y2-y1/x2-x1 2. Relevant equations Find a vector which is normal to the line and then use the dot product of this vector and P1P 3. The attempt at a solution I tried using numbers but I got lost. I don't what exactly this question is asking. Would I have to find the slope and then come up with a solution from that?