Growth Formulas — Complete Reference
1. Arithmetic Growth
Formula: Lt = + rt
| Symbol | Meaning | Units |
|---|---|---|
| Lt | Length/size at time t | mm, g, etc. |
| Initial length/size | mm, g, etc. | |
| r | Arithmetic growth rate (constant) | mm/day, g/day |
| t | Time | days |
Characteristic: Linear graph (straight line). One daughter cell continues dividing, one differentiates.
Example: A root elongates by 2mm every day.
- Day 0: = 5mm
- Day 3: = 5 + (2)(3) = 11mm