The graph in the image represents the function $y = \cot(x)$ (cotangent of $x$).

Here’s how we can identify this:

1. Vertical Asymptotes: The graph has vertical asymptotes at regular intervals, which is a characteristic of the cotangent function. Cotangent, like tangent, has vertical asymptotes at points where $\sin(x) = 0$, which occur at integer multiples of $\pi$.

2. Shape of the Curve: The curves between the asymptotes resemble the behavior of the cotangent function, which decreases as you move from left to right between its asymptotes. This contrasts with the tangent function, which increases between its asymptotes.

3. Periodicity: The period of the function appears to be $\pi$, matching the period of the cotangent function.

Thus, the correct answer is:

$\boxed{y = \cot(x)}$

Let me know if you'd like further details or have any questions! Here are some related questions to expand your understanding:

1. What are the key differences between the graphs of $\tan(x)$ and $\cot(x)$?
2. How can you determine the vertical asymptotes of $\tan(x)$ and $\cot(x)$?
3. What is the relationship between the periods of $\sin(x)$, $\cos(x)$, and $\tan(x)$?
4. Why do $\sec(x)$ and $\csc(x)$ have a different shape than $\cot(x)$?
5. How can transformations (like shifting or stretching) affect the graph of $\cot(x)$?

Tip: To quickly identify trigonometric graphs, look for key features such as asymptotes, periodicity, and whether the function is increasing or decreasing between these points!