Your answer would be, I believe, Billion gallons per day, Because, the independent quantity is time in days, and the dependent quantity is volume of water in billions. (Flow Rate: 84,760 Cubic Feet Per Second.).
Hope that helps!!!!! Have a great day : )
The most reliable source of medical health information is always a physician. Although certain websites can contribute accurate information they are not always as detailed as a physician.
There are a few but "work" would be accurate