the equation is y2 minus y1 over x2 minus x2 and then the answer you will get will look like a fraction when it is actually rise over the run so the 2 points i chose was (8,2) and (8,0) so 0 minus 2 equals negative 2 and 8 minus 8 equals 0 so -2 over 0 the slope would be -2/0 so you would go down 2 over 0 the line would be streight up and down! if i'm wrong someone tell me!!