To find $f(4)$ using the graph, you should:

1. Locate the point on the graph where $x = 4$.
2. Determine the corresponding $y$-coordinate. This $y$-value is $f(4)$.

Let's say, for example, that the graph shows that when $x = 4$, the $y$-coordinate is 3. This means that $f(4) = 3$.

Thus, if $f(4) = 3$, the answer to $f(4)$ is 3.

To solve the problem specifically, you'd need to examine the graph for the precise point at $x = 4$. Would you like to go over how to interpret graphs in more detail?

Relative Questions:

1. What is the significance of the $x$-coordinate in determining $f(x)$ on a graph?
2. How do you find the value of a function from its graph?
3. What are common mistakes when reading function values from graphs?
4. How does the slope of the graph at $x = 4$ influence $f(4)$?
5. How can you use the graph to estimate values not explicitly shown on it?

Tip:

When analyzing graphs of functions, always ensure you understand the scale and units on both axes, as they can significantly impact your interpretation of the function's values.