Answer :
Let us check the table 1
here,
y/x=5/1=5
y/x=6/2=3
y/x=7/3=2.33
In table 1 there is no relationship of 1.5 between the x- and y-values.
Let us check the table 2
y/x=1/1=5
y/x=5/2=2.5
y/x=9/3=3
In table 2 there is no relationship of 1.5 between the x- and y-values.
Let us check the table 3
y/x=3/2=1.5
y/x=5/4=1.25
y/x=7/6=1.166
In table 3 there is no relationship of 1.5 between the x- and y-values.
Let us check the table 4
y/x=3/2=1.5
y/x=6/4=1.5
y/x=9/6=1.5
In table 4 there is relationship of 1.5 between the x- and y-values.
hence, table 4 is the correct answer.