Question 811800
perpendicular lines have slopes that are inverses.
{{{5/1}}}
{{{-1/5}}}
These slopes are perpendicular.
Parallel lines have the same slope.

first solve the equations for y


a. {{{y=2x+5}}}
slope is {{{2/1}}}
{{{2x+y=9}}}
{{{y=-2x+9}}}
slope is {{{-2/1}}}
The slope arent the same or inverses.
neither


b.{{{3x+4y=7}}}
{{{4y=-3x+7}}}
{{{y=(-3/4)x+(7/4)}}}
slope is {{{-3/4}}}
{{{4x=3y-8}}}
{{{4x+8=3y}}}
{{{(4/3)x+(8/3)=y}}}
The slope is {{{4/3}}}
These slopes are inverses.
perpendicular