## Intermediate Algebra for College Students (7th Edition)

$a.$ A line parallel to the given line has slope $m=-\displaystyle \frac{3}{7}.$ $b.$ A line perpendicular to the given line has slope $m=\displaystyle \frac{7}{3}$
If two nonvertical lines are parallel, then they have the same slope. If two nonvertical lines are perpendicular, then the product of their slopes is -1. --- Reading the slope from $y=mx+b$ $y= -\displaystyle \frac{3}{7}x-2$: $\quad$ The given line has slope $m=-\displaystyle \frac{3}{7}$. $-\displaystyle \frac{3}{7}\cdot(\frac{7}{3})=-1$ $a.$ A line parallel to the given line has slope $m=-\displaystyle \frac{3}{7}.$ $b.$ A line perpendicular to the given line has slope $m=\displaystyle \frac{7}{3}$