The image provides a function $f(x) = 4x - 7$ and asks to find the value of $f(4)$.

Step-by-step solution:

1. The formula for the function is: $f(x) = 4x - 7$

2. To find $f(4)$, substitute $x = 4$ into the formula: $f(4) = 4(4) - 7$

3. First, calculate $4 \times 4 = 16$, so: $f(4) = 16 - 7 = 9$

Thus, $f(4) = 9$.

Would you like any further details on this? Here are some related questions you might find helpful:

1. How can you determine the slope of a function from its equation?
2. What is the significance of the value of $f(4)$ on the graph of this function?
3. How can you graph the function $f(x) = 4x - 7$ using points from the table?
4. What would $f(10)$ be using the same formula?
5. Can you explain how the function changes as $x$ increases?

Tip: Always substitute the given value of $x$ carefully to avoid small calculation errors.