Experimental data for the reaction

Alongrightarrow$2B+C$

have been plotted in the following three different ways $($with concentration units in $mo\frac{l}{L})$:

$$

$\frac{(\frac{?}{\text{b}\text{a}\text{r}}(L))}{}$

$$

What is the order of the reaction with respect to A$,$ and what is the initial concentration of A$?$