Question 955295
{{{drawing(300,300,-6,6,-6,6,grid(1),circle(-2,-1,0.2),circle(1,0,0.2),blue(line(-2,-1,1,0)))}}}
Based on the pattern, starting with (-2,-1) you move 3 units right and one unit up to get to (1,0). 
So then
(1,y)+(3,1)=(x,3)
1+3=x
x=4
y+1=3
y=2
(4,3),(1,2)
{{{drawing(300,300,-6,6,-6,6,grid(1),circle(4,3,0.2),circle(1,2,0.2),circle(-2,-1,0.2),circle(1,0,0.2),blue(line(1,0,4,3)),blue(line(4,3,1,2)),blue(line(1,2,-2,-1)),blue(line(-2,-1,1,0)))}}}