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Line A passes through points (6,8) and (1,-7). Line B is perpendicular to Line A. Line C is perpendicular to Line B. What is the slope of Line C? 

 May 9, 2018
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slope of Line A   =   [ y2 - y1 ] / [ x2 - x1 ]

 

slope of Line A   =   [ -7 - 8 ] / [ 1 - 6 ]

 

slope of Line A   =   [  -15  ] / [  -5  ]

 

slope of Line A   =   3

 

Line A is perpendicular to Line B and Line C is perpendicular to Line B. Since Line A and Line C are both perpendicular to Line B, Line A and Line C must have the same slope.

 

slope of Line C   =   3

 May 9, 2018

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