How it works
Direct: if A relates to B, then C relates to X:
X = (B × C) / A
Inverse: when one increases, the other decreases:
X = (A × B) / C
Examples
- Direct: A=10, B=50, C=20 → X = (50×20)/10 = 100
- Inverse: A=4, B=10, C=2 → X = (4×10)/2 = 20