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f(x)=-(1/2)x-4 What you do is find the opposite of the slope of the orriginal and just sub that in to get the equation perpendicular to the orriginal. graph that stuff son!
The slope of the perpendicular is -(1/2) .
If: y = 2/5x+10 then the perpendicular slope is -5/2x or -2.5x
+ 1/8
[ y = 2x plus or minus any number ] is parallel to it. [ y = -0.5x plus or minus any number ] is perpendicular to it.
If: 12 = 2y+x then y = -1/2x+6 So: y = 2x+4 and y = -1/2x+6 which means that they are perpendicular lines