Question 356411
Perpendicular lines have slopes that are negative reciprocals,
{{{m[1]*m[2]=-1}}}
{{{(1/2)*m[2]=-1}}}
{{{m[2]=-2}}}
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{{{y=-2x+b}}} where {{{b}}} is the y intercept.
{{{highlight(y=-2x+1)}}}
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{{{graph(300,300,-10,10,-10,10,(1/2)x+6,-2x+1)}}}