The question asks to determine whether the graphed function is linear or nonlinear.

Looking at the graph, we can see that the function does not follow a straight line. It has a peak and curves downward before leveling out and slightly increasing again. This curvature indicates that the function is nonlinear.

So, the correct answer is:

The graphed function is nonlinear.

Would you like a deeper explanation of why this function is considered nonlinear or have any other questions?

Here are some related questions to consider:

1. What makes a function linear versus nonlinear?
2. How can you determine the degree of a nonlinear function from its graph?
3. What are some real-life examples of nonlinear functions?
4. How does the slope of a linear function differ from that of a nonlinear function?
5. Can a nonlinear function ever resemble a linear function in any specific interval?

Tip: In general, a linear function will always graph as a straight line, while nonlinear functions can exhibit curves, peaks, or troughs.