Question 318794
Convert to slope-intercept form, {{{y=mx+b}}}
{{{9x-6y=12}}}
{{{-6y=-9x+12}}}
{{{y=(3/2)x-2}}}
The slope of this line is {{{m=3/2}}}
Perpendicular lines slopes are negative reciprocals.
{{{m1*m2=-1}}}
{{{(3/2)*m2=-1}}}
{{{highlight(m2=-2/3)}}}