QuestionThe following table represents an exponential function. \begin{tabular}{|c|c|} \hline$x$ & $y$ \\ \hline 0 & 4 \\ \hline 1 & 2 \\ \hline 2 & 1 \\ \hline 3 & $\frac{1}{2}$ \\ \hline 4 & $\frac{1}{4}$ \\ \hline \end{tabular}
The exponential function represented by the table can be written in the form $y=a b^{x}$. Find the values for $a$ and $b$. $$a=\square$$ $$b=$$ $\square$