The function in the table is quadratic:
$$\text{Unknown environment 'tabular'}$$
True
False

Step 1 ：The function in the table is given as follows:

Step 2 ：$$\text{Unknown environment 'tabular'}$$

Step 3 ：We need to check if the function is quadratic. A function is quadratic if the differences between consecutive function values form a constant sequence. This is because the difference between consecutive function values of a quadratic function is a linear function, and the difference between consecutive function values of a linear function is a constant function.

Step 4 ：Let's calculate the differences between consecutive function values and check if they form a constant sequence.

Step 5 ：The function values are -7, 1, 9, 17. The differences between these values are 8, 8, 8.

Step 6 ：The second differences are all 0, which means the differences between consecutive function values form a constant sequence.

Step 7 ：Therefore, the function in the table is quadratic.

Step 8 ：Final Answer: $\boxed{{\displaystyle \text{True}}}$