Answer:
Option 1.
Explanation:
In a linear function, the rate of change is constant.

From the first table it is clear that the value of y increased at a constant rate.
If the value of x increased by 1 unit, then the value of y increased by 2 units.

Only table 1 represents the constant rate of change, it means table 1 is a partial set of values for a linear function.
Therefore, the correct option is 1.