Question 691181
y = 5 - 3x or
y = -3x + 5
AND
3x - y = 8
y = 3x - 8
...
Perpendicular lines have negative inverse/reciprocal slopes.
In this case the slope is -3 and 3, which are not reciprocals;
therefore, these lines are not perpendicular.
…………………………….
Have more questions?  Get them all answered at once.
HomeworkHelpers@ReadingBoosters.com
Individualized Coaching: www.MyHomeworkAnswers.com 
--Reading Boosters