I∝T2\mathrm{I} \propto \mathrm{T}^{2}I∝T2
I∝1T\rm{I \propto \dfrac{1}{\sqrt{T}}}I∝T1
I∝1 T2\mathrm{I} \propto \dfrac{1}{\mathrm{~T}^{2}}I∝ T21