Which table of values represents a linear relationship?
x f(x)
−1 −3
0 −2
1 1
2 6
3 13
(1)

x f(x)
−1 ½
0 1
1 2
2 4
3 8
(2)
x f(x)
−1 −3
0 −1
1 1
2 3
3 5
(3)
x f(x )
−1 −1
0 0
1 1
2 8
3 27
(4)