m(slope) = Y2 - Y1/X2 - X1
(4, 2) and (- 2, - 1)
m = - 1 - 2/- 2 - 4
= - 3/- 6; 3/6; 1/2
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Points: (0, -1) and (-2, -4)Slope: 3/2
Points: (-1, 2) and (4, 3) Slope: 1/5
Points: (3, 2) and (-1, -4) Slope: (2--4)/(3--1) = 3/2 or 1.5
Points: (3, -4) and (-2, 1) Slope: -1 or -x
Points: (2, 1) and (-4, -5) Slope: (1--5)/(2--4) = 1