# Basic proportion question?

1. Apr 27, 2012

### CloudChamber

Hello all,
It seems I've forgotten a lot about basic math since Algebra one. I need some helpcreating a simple formula. I know that ionization density is proportional to the square of the charge (Ze). How would I express this mathematically?

2. Apr 27, 2012

### DonAntonio

$$ID = k(Ze)^2$$ with k being the constant of proportionality

DonAntonio