Here is the graph of profit $P$ (in thousands of dollars) versus the number of widgets sold $n$ (in thousands). The curve represents the profit function $P(n) = -15 + 10n - 0.2n^2$.

This graph shows how profit changes as the number of widgets sold increases. Would you like to continue with part (b) or have any questions about the graph?

Here are 5 related questions:

1. What does the shape of the graph tell you about maximum profit?
2. How would the graph change if the production costs decreased?
3. How do real-world factors like demand affect profit functions?
4. What is the significance of negative profits in a business scenario?
5. What happens to the graph as $n$ approaches its limits?

Tip: To find optimal production levels, look at the vertex of the parabola in the profit graph.