Question 621707
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Determine whether each pair of equations represents perpendicular lines.
y=5-3x, 3x-y=8 
  y = mx + b
  y = -3x + 5    m = -3
& y = 3x - 8     m = 3    
 NO, this pair of equations do not represent perpendicular lines 
{{{drawing(300,300,   -6, 6, -10, 6,  grid(1),

graph( 300, 300, -6, 6, -10, 6,0,-3x+5,3x-8))}}}