Question 322656
when you rewrite the given equation in slope intercept form and solve for y, you get the slope of 1/3

{{{x=3y}}}
{{{3y=x}}}
{{{y=1/3x}}}

To find the slope of a perpendicular line you use the NEGATIVE RECIPROCAL of the original slope.

{{{1/3}}} ----> {{{-3/1}}}  or -3