#### Answer

parallel: $m=-\dfrac{3}{2}$
perpendicular: $m=\dfrac{2}{3}$

#### Work Step by Step

$\bf{\text{Solution Outline:}}$
Use the fact that parallel lines have same slopes while perpendicular lines have negative reciprocal slopes.
$\bf{\text{Solution Details:}}$
In Exercise $76,$ the computed value of the slope of the line is $m=-\dfrac{3}{2}.$
Since parallel lines have the same slope, any line that is parallel to the given line will also have a slope of $m=-\dfrac{3}{2}.$
Since perpendicular lines have negative reciprocal slopes, any line that is perpendicular to the given line will have a slope of $m=\dfrac{2}{3}.$