O (1,-1) is collinear with (2, 1) and (3, 3).
Step-by-step explanation:
equation of line in point slope form is
y-y1/x-x1 = m
where m is the slope of line
slope of line is given by
m = (y2-y1)/(x2-x1)
where(x1,x2) and (y1,y2) are points on the given line
So the answer is (1,-1)
