17-10-2016
Mathematics

Answered

What is the equation of the perpendicular line to y=-1/4x+1 that passes through (5,21)

Verified Answer :

Anonymous Anonymous

17-10-2016

I hope this helps you

y=-1/4x+1 line slope is m=1/4

perpendicular lines slopes multiples -1

m.m'=-1

1/4.m'=-1

m'=-4

(5,21) x'=5 y'=21

m'. (x'-x)=y'-y

-4. (5-x)=21-y

-20+5x=21-y

-y=5x-41

y=41-5x

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