Question: The graph of a function models the percentage of charge $C$ in a phone battery over a period of time $t$, in hours. Based on the graph, which of the following collections of statements about the function and scenario is accurate?

1. **State the problem:** We are given a graph showing the percentage of charge $C$ in a phone battery over time $t$ (in hours). We need to determine which statements about the function and scenario are accurate. 2. **Analyze the graph:** The graph shows a single curve starting high near the $y$-axis (high charge) and decreasing continuously to a low value near the $x$-axis (low charge) as time $t$ increases. 3. **Interpret the function behavior:** Since the curve is always going down as $t$ increases, the function $C(t)$ is strictly decreasing. 4. **Conclusion:** The battery charge decreases continuously over time; it is never increasing or constant. Therefore, the accurate statement is: "The function is always decreasing. As time increases, the charge of the battery is always decreasing."