SOLUTION: What is the slope of a line perpendicular to f(x) = 2x - 4?

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Question 548202: What is the slope of a line perpendicular to f(x) = 2x - 4?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
m=2/1
the opposite of the reciprical is the slope of the perpendicular line
-1%2F2