The given problem asks to complete the table for the function $f(x) = 2x + 4$. We need to calculate $f(x)$ for the given values of $x$.

The function is linear, where: $f(x) = 2x + 4$

Let's calculate $f(x)$ for each value of $x$:

1. $x = 0$: $f(0) = 2(0) + 4 = 4$
2. $x = 1$: $f(1) = 2(1) + 4 = 6$
3. $x = 2$: $f(2) = 2(2) + 4 = 8$
4. $x = 3$: $f(3) = 2(3) + 4 = 10$

Thus, the completed table is:

Would you like further details on how this was computed or on the properties of linear functions?

Here are 5 follow-up questions you might find useful:

1. What is the slope of the function $f(x) = 2x + 4$?
2. How would the function change if the slope were different?
3. What is the meaning of the number 4 in the function $f(x) = 2x + 4$?
4. How would the graph of $f(x) = 2x + 4$ look?
5. What other kinds of functions are similar to linear ones?

Tip: In a linear function, the coefficient of $x$ (in this case, 2) represents the slope, showing how steep the line is.