Weighted regression coefficients for the age versus [El/Fe] relation of 62 OCs by R_GC. The yellow area corresponds to the elements of the first s-process peak (Y and Zr), and the cyan area corresponds to those of the second peak (Ba, La and Ce). In the upper panel, we show the slope in dex Gyr⁻¹ of the relations. In the central panel, we present the value of the intercept (dex), while in the bottom panel we see the correlation coefficient. In all panels, we use the following symbols: blue circles for the inner region, green circles for the solar region, pink circles for the outer region, and dashed black lines for the whole sample.