With the help of a graph, describe arithmetic growth.

(N/A) Arithmetic growth is a type of growth where one daughter cell continues to divide while the other differentiates and matures. The simplest expression of arithmetic growth is exemplified by a root elongating at a constant rate.
- Refer to the provided graph, which shows constant linear growth by plotting the length of the organ $(L)$ against time $(t)$.
- On plotting the length of the organ against time, a linear curve is obtained.
- Mathematically, it is expressed as:
$L_{t} = L_{0} + rt$
Where:
$L_{t} = \text{length at time } t$
$L_{0} = \text{length at time zero}$
$r = \text{growth rate / elongation per unit time}$