The line of best fit is an output of regression analysis that represents the relationship between two or more variables in a dataset.

Apple Inc. is plotting its artificial intelligence comeback with an ambitious slate of new devices, including robots, a lifelike version of Siri, a smart speaker with a display and home-security ...

To do this, they often plot different forecast intensities on a chart that progresses over time. This line plot gives forecasters an idea of what could happen.