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)

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