How is $r_{inst}$ obtained from a graph? Write the method to obtain $r_{inst}$.

(N/A) The instantaneous rate of reaction $(r_{inst})$ is obtained from a concentration-time graph by following these steps:
$1$. Plot the concentration of the reactant versus time $(t)$.
$2$. Choose a specific point on the curve corresponding to the time at which the instantaneous rate is required.
$3$. Draw a tangent to the curve at that specific point.
$4$. Calculate the slope of this tangent.
$5$. The instantaneous rate $(r_{inst})$ is equal to the negative of the slope of the tangent for reactants,i.e.,$r_{inst} = -\text{slope} = -\frac{d[R]}{dt}$.