To determine the percentage rate of growth from a graph depicting exponential growth, you typically need to extract two key points from the graph: the initial value (when the school opened) and the value after a certain period. However, since you haven't provided the graph, let's outline the general steps to calculate the percentage rate of growth:

1. Identify Two Points on the Graph: You need to determine the population at two different times. Let these points be $(t_1, P_1)$ and $(t_2, P_2)$, where $P_1$ is the population at time $t_1$ and $P_2$ is the population at time $t_2$.

2. Apply the Exponential Growth Formula: $P(t) = P_0 \cdot e^{rt}$ Here, $P(t)$ is the population at time $t$, $P_0$ is the initial population, $r$ is the growth rate, and $t$ is time.

3. Calculate the Growth Rate $r$: $r = \frac{1}{t_2 - t_1} \ln\left(\frac{P_2}{P_1}\right)$

4. Convert to Percentage: Multiply $r$ by 100 to get the percentage growth rate.

If you have the graph or specific values, I can calculate the growth rate for you.

Would you like to upload the graph or share specific values from it?