Slope (M)= rise/run=y/x=(y2-y1)/(x2-x1) 1a. (1,2) and (7,9)
1b. (5,-1) and (0,3)
1c. (12,5) and (9,8)

1a. 7/6

1b. -4/5

1c. -1

Step-by-step explanation:

1a. 9-2/7-1 = 7/6

1b. 3--1/0-5 = 4/-5 = -4/5

1c. 8-5/9-12 = 3/-3 = -3/3 = -1

Fraction division is basically multiplication of a reciprocal.

For example (1/4)/(1/8) = (1/4)x(8/1)=2

Multiplication of the answer and the piece that divides (in this case 2 x 1/8), you should get the piece that is being divided (in this case 1/4). If that is correct, then your division is correct.