Use kinetic data for computing ODE

I have time-dependent data below where left column is time and the right column is parameter x.

      0.0000   57.2000
      0.2000   57.1956
      0.4000   56.8763
      0.6000   55.7063
      0.8000   53.9004
      1.0000   51.8108
      1.2000   49.6590
      1.4000   47.5496
      1.6000   45.5352
      1.8000   43.6396
      2.0000   41.8686

I want to use these data to compute y in the following ODE:

dy/dt = mu*y; mu = (x-0.25)^2, x is the temperature that varies with time (t) and is obtained from the above-mentioned matrix.

Maybe it is silly to ask. But, any help would be appreciated. Thanks,