The slope of the x-axis is zero The slope of the y-axis is "undefined" or "infinity". Whichever term you use, it's not a number that can participate in ordinary arithmetic operations. So the product of the slopes can't be calculated For any other two perpendicular lines, the product of their slopes is -1.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.