Compound A decomposes to $P$ and $R$ according to the following reaction:

$AP+R$

The initial reaction rate of A was determined experimentally at different initial

concentrations of $A,$ as shown in the table below:

Determine graphically the order of the reaction. In the answer box, put $0$ for the

zeroth order, $1$ for the first order, or $2$ for the second order$).$