Question 90530
Rewrite the slope 0.2 into fraction form

{{{0.2=2/10}}}


If you're given a slope of {{{m=2/10}}}, you can find the perpendicular slope by negating and inverting the given slope.


In other words, use this formula to find the perpendicular slope:

{{{m[p]=-1/m}}} where m is the given slope and {{{m[p]}}} is the perpendicular slope


{{{m[p]=-1/(2/10)}}} plug in {{{m=2/10}}} 


{{{m[p]=(-1/1)(10/2)}}} Flip the second fraction and multiply


{{{m[p]=-10/2}}} Multiply


{{{m[p]=-5}}} Reduce



So the perpendicular slope is {{{-5}}}