Determine which table is non-linear on a scatterplot?

option 1:
x;199,150,250,175,300,475,375,225,350,
300
y; 15,35,60,40,45,90,85,50,75,90
x;100,525,600,450,250,125,50
y;95,25,25,35,110,250,300
option 2;
x;15,35,60,40,45,90,85,50,75,80
y;100,150,250,175,300,475,375,225,355,
300
x;10,5,65,25,100,110,95
y;95,525,275,450,250,300
option 3;
x;15,35,60,40,45,90,85,50,75,80
y;100,150,250,175,180,375,375,225,350,
400
x;10,5,65,25,100,110,95
y;95,50,275,105,250,175,300
option 4;
x;15,35,60,40,45,90,85,50,75,80
y;100,150,250,175,180,500,475,225,350,
400
x;10,5,65,25,100,110,95
y;96,50,275,105,600,650,575

Option 3 is the non-linear table on the scatterplot.