If you follow the slope formula your answer should be -1 proof: slope formula: Y2-Y1/X2-X1=Slope (M) 4,-1 will be our x1,y1 and -1,4 will be our x2,y2 plug in numbers into formula: 4-(-1)/ -1-4 simplify you get 5/-5 simplify again and your answer is -1!!! If its wrong im sorry
