Consider the following data for a freelance writer editing articles. The table shows the total number of articles edited based on the number of hours worked in a single day.

| Hours Worked | Total Articles Edited |
|--------------|-----------------------|
| 0            | 0                     |
| 1            | 5                     |
| 2            | 9                     |
| 3            | 12                    |
| 4            | 14                    |
| 5            | 15                    |

Analyze the relationship between the hours worked (input) and the total articles edited (output). In your analysis, describe how the productivity of each additional hour changes and provide a plausible real-world explanation for this pattern.