From the graph, we can assume that the value of R is:
[tex]R\approx3.1[/tex]From the choices we have:
[tex]\begin{gathered} \sqrt[]{8.9}\approx2.98 \\ 3.75 \\ \pi\approx3.141592654 \\ \frac{11}{3}\approx3.667 \end{gathered}[/tex]Therefore, the most approximate option is:
[tex]\pi[/tex]
