Question 1179045
.
<pre>

Line 1 has the slope  {{{m[1]}}} = {{{-6/4}}} = {{{-3/2}}}.


Line 2 has the slope  {{{m[2]}}} = {{{3/2}}}.


Line 3 has the slope  {{{m[3]}}} = 2.


Comparing the slopes, we conclude


    (1)  Lines 1 and 2 are neither parallel nor perpendicular (the slopes are neither equal nor negatively reciprocal).


    (2)  Lines 2 and 3 are neither parallel nor perpendicular (the slopes are neither equal nor negatively reciprocal).


    (3)  Lines 1 and 3 are neither parallel nor perpendicular (the slopes are neither equal nor negatively reciprocal).
</pre>

Solved, answered and explained.