Answer:
Third table represents the second piece of the function f(x)
Explanation:
The second piece of the function f(x) is

Now, we substitute some values of x and find the corresponding function values and check which table satisfy the points.
For x = 1

For x = 2

For x = 3

Among the given tables, third tables contains these values.
Third table represents the second piece of the function f(x)