slope of line joining the given points
= (-3+1)/(2+2) = -2/4 = -1/2
So slope of perpendicular line is 2
8. Find the slope of a line that is perpendicular to the line containing the points (-2, -1) and (2,- 3).
0m = - 2
m = 2
Om = - 1/2
m = - 1
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