SOLUTION: Please help. Find the slope of any line perpendicular to the line through points (9, 20) and (3, 2). Thanks JMS

Question 112014: Please help.
Find the slope of any line perpendicular to the line through points
(9, 20) and (3, 2).
Thanks
JMS

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
First find the slope through (9, 20) and (3, 2):

Solved by pluggable solver: Finding the slope

Slope of the line through the points (9, 20) and (3, 2)

Answer: Slope is

Now to find the perpendicular slope, simply negate 3 to get -3. Now take the reciprocal of -3 (think of it as ) to get

So the perpendicular slope to the line through (9, 20) and (3, 2) is

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