To find a function rule for the table, let's first observe the relationship between the input \( x \) and the output \( f(x) \).
The given values are:
\[ \begin{align*} x & : -3, -2, -1, 0 \ f(x) & : 1, 2, 3, 4 \ \end{align*} \]
We can notice the pattern of \( f(x) \) relative to \( x \):
- When \( x = -3, f(x) = 1 \)
- When \( x = -2, f(x) = 2 \)
- When \( x = -1, f(x) = 3 \)
- When \( x = 0, f(x) = 4 \)
It seems that the function \( f(x) \) increases by 1 as \( x \) increases by 1. Specifically, we can see that if we add 4 to \( x \), we obtain \( f(x) \):
- For \( x = -3 \): \( f(-3) = -3 + 4 = 1 \)
- For \( x = -2 \): \( f(-2) = -2 + 4 = 2 \)
- For \( x = -1 \): \( f(-1) = -1 + 4 = 3 \)
- For \( x = 0 \): \( f(0) = 0 + 4 = 4 \)
Based on this pattern, we can formulate the function rule:
\[ f(x) = x + 4 \]
Thus, the function rule for the table is:
\[ \boxed{f(x) = x + 4} \]