Question

Which of the following is the most appropriate unit to describe the rate at which water flows over Niagara Falls?

Answer 1

Units we have to choose from?

Answer 2

Day per billion gallons, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days

Billion gallons per day, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days

Billion gallons per day, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons

Day per billion gallons, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons

Answer 3

Third answer.

Answer 4

Billions of gallons per day is the appropriate unit for water, rather than the day. Further, the amount of time affects how many gallons have fallen, so the time is the independent variable.

Answer 5

Thanks