You can put this solution on YOUR website! Lines that are perpendicular have slopes that are the "negative reciprocal" of each other.
For example: if Line #1 has a slope = 2; than the line that is perpendicular to Line #1 will have a slope of -(1/2) or -1/2.
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Find the slope of any line perpendicular to the line through points (0,5) and
(-3,-4).
Slope =m=(y1-y2)/(x1-x2) [formula for the slope of a line]
Slope #1 =m=(5-(-4))/(0-(-3))=-9/-3=3 [plug-in the values and solve]
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Than Slope #2 = -(1/3)=-1/3