Question

The lines shown below are perpendicular. If the green line has a slope of

2/5 , what is the slope of the red line?

Answer 1

-5/2

Explanation:

for perpendicularity;

`m1 = ( - 1)/(m2)`

where m1 is first slope

and m2 is second slope

so here, let m1 be green line slope

and m2 be red line slope

thus,

`m2 = ( - 1)/(m1)`

`m2 = ( - 1)/( (2)/(5) ) = - 1 / (2)/(5)`

`= - 1 * (5)/(2) = ( - 5)/(2)`