SOLUTION: What is the slope of the line that is perpendicular to the line y=-11/20x-9?

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Question 1052587: What is the slope of the line that is perpendicular to the line y=-11/20x-9?
Found 2 solutions by Edwin McCravy, Boreal:
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
+20/11.

How did I get it?  I took the coefficient of x,
which is the slope of the given line, -11/20.  
Then I flipped it and changed the sign, and got 
+20/11.

Edwin

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Perpendicular lines have a slope that is the negative reciprocal of the line they are perpendicular to. Their product multiplies to minus 1.
-11/20 is the slope of the line
+20/11 is the slope of the line perpendicular to it.