A line that's perpendicular would have a slope that the negative reciprocal of the line in the question 1. use the points to find the slope (y1-y2)/(x1-x2) =(-3-7)/(-7+5) (it's +5 because --5=+5) =-10/-2 -5 slope of the line is -5 2. The negative reciprocal is basically flipping over a fraction (3/4 would become 4/3) and then multiplying it by -1 (4/3 would become -4/3) Because -5 is really -5/1 you would flip it to -1/5 then multiple by -1 to equal 1/5. 3. Now we just need any line that has a slope of 1/5 y=mx+b where m=1/5 and b is whatever number you want y=1/5x+8 y=1/5x-193748 y=1/5x-103595 All these are right answers just pick your favourite number for b