(There is another chart type that Excel makes which does that - don't use it!) The name of the process used to create the best-fit line is called linear regression. In scientific graphs, one almost never "connects the dots". ![]() That's why another name for trendline is best-fit line. It may or may not actually pass through any particular points. You should notice that the trendline is the best line that fits through the points. In the example above, we had Excel calculate and plot a linear trendline through the points. ![]()
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