Question 901053
(2,3) 
(2, -2) m = 5/0  Vertical Line (NO Slope)
(-1,-3) m = 1/3
(2 ,3)  m = -6/-3 = 3/1
NO right angle
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), 
circle(-1, -3,0.2),
circle(2, -2,0.2),
circle(2, 3,0.2),
graph( 300, 300, -6, 6, -6, 6) )}}}