Question 1131877
perpendicular slopes multiplied together=-1, the negative reciprocal.  None of these lines is perpendicular. The graph below shows a line perpendicular to the first one.
the first is y=(-1/2 )x+3
the second is y=(3/2) x -3
the third is y=(-3/2)x+3/2
{{{graph(300,300,-10,10,-10,10,(-1/2)x+3,(3/2)x-3,(-3/2)x+1.5)}}}
{{{graph(300,300,-10,10,-10,10,(-1/2)x+3,2x-3)}}}