Question

Find the slope of a line perpendicular to the foloowing line  `(3"x")/4 -"y" = 5`

Answer 1

When two lines are perpendicular to each other the product of their slope is -1.

i.e m₁ x m₂ = -1

`(3"x")/4 -"y" = 5` 

y = `3/4"x" - 5`

m₁ = `3/4`

Slope of required line (m₂) = `-1/"m"_1 = (-4)/3`