Matching 

As per collision theory,

Rate of reaction$=-\frac{\mathrm{dx}}{\mathrm{dt}}=Z\times f$

Boltzmann’s factor, $\mathrm{f}={\mathrm{e}}^{-\frac{{\mathrm{E}}_{\mathrm{a}}}{\mathrm{RT}}}$

Activation energy = threshold energy – average K.E of reacting molecules