Use the slope formula to find the slope of these sets of points.
1. (3,6) & (1,2)
4. (-4,4) & (-6,6)
2. (-2,7) & (2,-5)
5. (-10,-8) & (-12, -16)
3. (-4,8) & (-14,8)
6. (3,8) & (8,13)

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm