The equation of line AB is (y−3) = 5 (x − 4). What is the slope of a line perpendicular to line AB?

1 Answer
Jim G.
Apr 30, 2017

m_("perpendicular")=-1/5

Explanation:

y-3=5(x-4)" is in "color(blue)"point-slope form"

"that is " y-y_1=m(x-x_1)

"where m represents the slope"

rArr"slope " =m=5

"the slope of a perpendicular line is the"
color(blue)"negative inverse of m"

rArrm_("perpendicular")=-1/5

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