SOLUTION: Line l[1] has a slope of 1/2. Line l[2]is perpendicular to l[1]. What is the slope of line l[2]?

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Question 916293: Line l[1] has a slope of 1/2. Line l[2]is perpendicular to l[1].
What is the slope of line l[2]?
Found 2 solutions by MathLover1, ewatrrr:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

if line l[1] has a slope of m=%281%2F2%29, and line l[2] is perpendicular to l[1].
then the slope m%5Bp%5D of line l[2] is negative reciprocal of m
so,
m%5Bp%5D=-1%2Fm
m=%281%2F2%29
m%5Bp%5D=-1%2F%281%2F2%29
m%5Bp%5D=-2

example:
y=mx and perpendicular line is y=m%5Bp%5Dx
y=%281%2F2%29x and perpendicular line is y=-2x
+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%281%2F2%29x%2C-2x%29+

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Line l[1] has a slope of 1/2. Line l[2]is perpendicular to l[1].
What is the slope of line l[2] = -2/1 (negative reciprocal of 1/2)%281%2F2%29%28-2%2F1%29+=+-1
slope of line l[2] = -2