In a proportional relationship between the total number of tennis balls and the number of cans, the coordinates (2, 6) represent the number of cans and the total number of tennis balls, respectively.
Here, the first value (2) indicates the number of cans, and the second value (6) represents the total number of tennis balls.
Thus, the correct interpretation of the point (2, 6) is:
B. There are two cans with 6 tennis balls.