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Homework Statement
The line l has equation y = 3x + 4
Cans someone xplain how [tex]y = -\frac{1}{3}x-4[/tex] is perpendicular to line l(bisects l at 90°)
Homework Equations
y = mx + c
Last edited:
Just correcting a typo: you mean perpendicular if and only if (m_{1})(m_{2})= -1.and parallel if and only if (m_{1})(m_{2})= -1.
cant it beperpendicular if and only if (m1)(m2)= -1.