The correct statement is: A regression line and trend line are equivalent terms.
In statistics, a trend line is often used interchangeably with a regression line, as both are used to describe the relationship between variables in data analysis. However, it's important to note that while all regression lines serve as trend lines, not all trend lines are necessarily derived purely from regression analysis (for example, a moving average can also be considered a type of trend line). Nonetheless, in many contexts, they convey similar concepts.