#### Answer

parallel line: slope=0.2=1/5
perpendicular line: slope=-5

#### Work Step by Step

We know that two parallel lines have the same slope ($m_1=m_2$).
We also know that perpendicular lines have negative reciprocal slopes ($m_1=-\frac{1}{m_2}$).
Thus a line parallel to a line with slope $m_1=0.2=1/5$ has slope $m_2=0.2=1/5$.
And a line perpendicular to the line with slope $m_1=0.2=1/5$ has a slope $m_2=-\frac{1}{1/5}=-5$.