What is the equation of the line perpendicular to #y=-1/5x # that passes through # (7,4) #?
all line perpendicular to this will have a slope of
(if a line has a slope of
If a line has a slope
then we can write the equation of this line in "slope-point" form as
In this case
While this is a valid answer to the given question, let's convert it into standard form: