In one of the many threads on determining how much food to carry whilst backpacking, someone here suggested something like 2lbs for every 10miles hiked. I liked it cause it's simple, and I used it during my AT sections last year. If it was 50 miles to the next town, I'd pack 10 lbs - That would be 2 lbs per day if I hiked 10 mile days. If I upped my distance, cutting the passage to 4 days, I'd also up my caloric needs per day. Beautiful in its simplicity. Instead of "2" make it a variable for the weather/elevation gains/personal metabolism ...
Anyway, I'd like to find the person responsible for the concept ...