10. We need to identify the value of b in the function:
[tex]f(x)=b^x[/tex]
so that it produces the graph given.
Observing the graph, we see that the point (1,2) lies on it. Thus, we have:
[tex]\begin{gathered} 2=b^1 \\ \\ \Rightarrow2=b \end{gathered}[/tex]
Therefore, the value of the base b is: 2
