slope, m = y2 - y1/ x2 - x1 = 5 -5/ 5 - (-4) = 0/9 => m = 0
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For two point s to calculate the slope use the equation ;-
m = (y(1) - y(2)) / (x(1) - x(2))
Remember the 'y' goes on top and the first terms to the left.
Hence
m = ( 5 - 9) / ( -2 - 4) =>
m = ( - 4)/ (-6)
m = (4/6)
m = 2/3 (Positive slope).
If you mean points of (2, 4) and (4, 2) then the slope is -1
The line is vertical and so the slope is undefined.
If you mean points of (5, -9) and (2, 3) then the slope is -4
If you mean points: (6, 4) and (4, -2) then the slope works out as 3
Points: (3, 4) and (2, 1) Slope: 3