Question 315196
Find the slope of each line.
Put each line in slope-intercept form, {{{y=mx+b}}}.
Perpendicular lines have slopes that are negative reciprocals.
{{{m1*m2=-1}}}
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{{{2x-3y=-15}}}
{{{-3y=-2x-15}}}
{{{y=(2/3)x+5}}}
{{{m1=2/3}}}
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{{{3x + ky = 12}}}
{{{ky=-3x+12}}}
{{{y=-(3/k)x+12}}}
{{{m2=-(3/k)}}}
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{{{m1*m2=-1}}}
{{{(2/3)(-(3/k))=-1}}}
{{{highlight(k=2)}}}