SOLUTION: Find the slope of a line perpendicular to the line that passes through the following points: (3, 9) and (7, 15)

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Question 412542: Find the slope of a line perpendicular to the line that passes through the following points: (3, 9) and (7, 15)
Answer by algebrahouse.com(1659) About Me  (Show Source):
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Find the slope of a line perpendicular to the line that passes through the following points: (3, 9) and (7, 15)

Perpendicular lines have slopes which are negative reciprocals

y2 - y1
-------- = slope
x2 - x1

15 - 9
------- {substituted coordinates into slope formula}
7 - 3

6
-- {subtracted}
4

= 3/2 {reduced}

the perpendicular slope would be -2/3 {the negative reciprocal of 3/2}
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