7.(03.01) Consider the two groups listed below. Which statement describes the sets? (2 points)
• the length of a swimming pool
• the liquid volume of the pool
The relation (length, volume) is a function, but the Qlation (volume, length) is not.
The relation (volume, length) is a function, but the relation (length, volume) is not.
O Both the relation (length, volume) and the relation (volume, length) are functions.
Neither the relation (length, volume) nor the relation (volume, length) is a function.