To determine the x-interval on which the graph is decreasing, we analyze the graph's slope:

1. From the left side, the graph starts from a point around $(-6, -6)$ and increases until it reaches its maximum point at $(2, 10)$.
2. After reaching the peak at $(2, 10)$, the graph starts decreasing as the slope becomes negative, continuing down until $(6, -2)$.

Thus, the graph is decreasing between the x-values $2$ and $6$, meaning the correct answer is:

Option: (2, 6)

Would you like more details or further explanations?

Here are 5 questions to expand on this topic:

1. What does it mean for a graph to be increasing or decreasing?
2. How can the slope of a line indicate whether the graph is increasing or decreasing?
3. What is the significance of a graph’s maximum and minimum points?
4. How can we determine intervals of increase and decrease algebraically?
5. How do changes in the slope affect the shape of the graph?

Tip: The slope of a line segment on a graph tells you whether the graph is increasing (positive slope) or decreasing (negative slope).