1. The problem is to analyze the function shown in the provided link (a stack plot). Since the link is an image and no explicit function is given, we will assume the task is to understand or describe the function behavior. 2. Typically, stack plots represent cumulative data over categories or time. To analyze such a function, we look at the sum of the stacked components at each point. 3. Without explicit data or function, we cannot write a formula. However, if you provide the function or data points, we can proceed with algebraic or calculus analysis. 4. Please provide the function or data for detailed steps and solution.