For the reaction, \( A + B \rightarrow \) products, the following data is obtained: A + B \( \rightarrow \) products, the following data is given: $$ \begin{array}{|c|c|c|c|} \hline \text{Exp. No.} & [A] \, (\text{mol L}^{-1}) & [B] \, (\text{mol L}^{-1}) & \text{Initial rate} \, (\text{mol L}^{-1} s^{-1}) \\ \hline 1 & 0.2 & 0.4 & 0.8 \\ 2 & 0.4 & 0.2 & 1.6 \\ 3 & 0.3 & 0.2 & 0.4 \\ \hline \end{array} $$ The rate law of the reaction is: