[0.025624005084707302, 0.013611438189866154, -0.03356959546221716, 
    0.044110895217014695, -0.025071632845910546, -0.03630825219957193, 
    -0.010335514810672464, -0.008151147943185166]
How to do linear regression, taking errorbars into account?