regression curve (noun)

1. The regression curve of a terrifying movie's box office performance can help predict its future success.

2. In the world of anime, the regression curve between the number of episodes and its popularity can be quite interesting to analyze.

3. When studying historical economic data, economists often fit a regression curve to understand the relationship between different variables.

4. The regression curve of viewership ratings for popular cartoons in the 90s shows a gradual decline over time as children grew older.