Is paying off debt a good example of exponential decay?

if so, why?

if not, what is a good example?

Possibly

Step-by-step explanation:

It depends on how you're paying it off, is it a set amount or a percentage? If it's by a percentage then the debt never gets completely paid off but I guess that could work. If it's a set amount, such as $50 per month, then it doesn't quite work as what you're paying back relative to the amount of money you still owe changes as time goes on. A better example that I know my math teacher always used was the decay of radioactive material such as Carbon-14 and half-life, all that.