A trend line in Excel is a graphical representation of the relationship between two variables in a data set. It is a straight line that best fits the data points on a scatter plot.
The error of a trend line in Excel is calculated using the least squares method. This involves finding the vertical distance between each data point and the trend line, squaring these distances, and adding them together. The resulting sum is the error of the trend line.
The error of a trend line in Excel indicates how well the line fits the data points. A lower error value indicates a better fit, while a higher error value indicates a poorer fit.
No, the error of a trend line cannot be negative in Excel. It is always a positive value, as it is calculated by squaring the vertical distances between the data points and the trend line.
The error of a trend line in Excel can be reduced by adjusting the line's slope and intercept values. This can be done manually or by using the "Add Trendline" feature in Excel, which automatically calculates the best fit line for the data points.