Dear, I performed a least squares regression. I will plot the results obtained with Gretl(coefficients) in Excel. However, I do not know how to proceed. Should I use theadjusted figures provided by Gretl or can I use a range of values ​​for the X axis? By using a range of value for the X axis (with the regression coefficients of Gretl), the figures obtained in Excel showed exact correlation (R = 1). Therefore, I think I'm not plotting the graph correctly. Could anyone help me? Thanks Daniela T. Santos