Frequency shifts of the individual l = 1 frequencies (black dots) of KIC 10644253 as a function of frequency. The dot-dashed lines correspond to the weighted averages over two different frequency ranges represented by the total length of the lines, while the red solid line corresponds to a weighted linear fit. The blue square corresponds to the modeled value of the frequency shift at ν_max (see Sect. 6 and Table 1).