a no slope is when lines are vertical. a,it is found by rise over run is with pt,positive negative zero undefined,it is found betwieen 2 points,positive,negative,rise/run,zero,negative slope,m=slope,rise over run,a other name for a no slope is a undefi,y2-y1 over x2-x1,points,it is found by a negative and positive,undefined,m=slop,y2-y1/x2-x1,line,it is found between 2 points,negative slop postie zero,positive, negative, zero, undefined,undefined,zero,posit,negative,horiz,vert,in fraction form,hit the quan,