The polynomial trendline is a curved line with the function: Polynomial trendline equation and formulas a dependent or response variable y (named as known_y's).an independent, predictor, or explanatory variable x (named as known_x's),.The degree of the polynomial is specified in the Order field - see more about the polynomial trendline in Excel.Įxcel uses the least squares method to fit a polyline for the data points.įor a trend line, two sets of variables are required:
