physics lab and lab summary

The plot of T vs M is performed as below to determine the relationship between time (period) and mass.
    Mass (kg)
    Time (s)
    T^2(sec^2)
    0.001
    0.677
    0.458329
    0.002
    0.543
    0.294849
    0.003
    0.464
    0.215296
    0.004
    0.451
    0.203401
    0.005
    0.44
    0.1936
    0.006
    0.437
    0.190969
    0.007
    0.42
    0.1764
    0.008
    0.415
    0.172225
    0.009
    0.4
    0.16
    0.01
    0.37
    0.1369

The relation power gives us , the data proves us the rotation of attached string reduces on rise of mass which exhibits centripetal force making the object to stay in line unless...