To find the average rate of change of a function over an interval, you can use the formula:

$\text{Average Rate of Change} = \frac{f(b) - f(a)}{b - a}$

where $a$ and $b$ are the endpoints of the interval, and $f(a)$ and $f(b)$ are the function values at these points.

You provided the interval $3 \leq x \leq 6$. To proceed with the calculation, I need the values of the function $f(x)$ at $x = 3$ and $x = 6$ from the table you're referring to.

Could you please share the table or the function values at these points so I can calculate the average rate of change?