Question 607712
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi
Y = 1/3x + 1  Pt(0,1)& Pt(3,2)on this line
Y = -3x + 11  Pt (0,11)& Pt(1,8)on this line
plot Pts and connect with respective lines: 
Slopes of the lines are negative reciprocals of one another.  Lines are perpendicular.
Lines Intersect at (3,2)
{{{drawing(300,300,   -15,15,-15,15,  
 grid(1),
circle(3, 2,0.4),
circle(0, 1,0.4),
circle(0,11,0.4),
circle(1, 8,0.4),
circle(3, 2,0.4),
graph( 300, 300, -15,15,-15,15,0,(1/3)x + 1,-3x + 11))}}}