For line 1
[tex]\begin{gathered} M1=3 \\ B1=-4 \end{gathered}[/tex]For line 2:
[tex]\begin{gathered} M2=-3 \\ B2=1 \end{gathered}[/tex]The lines are parallel if:
[tex]\begin{gathered} M1=M2 \\ 3=-3 \\ False \end{gathered}[/tex]They are not parallel
The lines are perpendicular if:
[tex]\begin{gathered} M1\cdot M2=-1 \\ 3\cdot-3=-1 \\ -9=-1 \\ False \end{gathered}[/tex]They are not perpendicular
