Final answer:
The most important variable in this problem is the number of minutes Logan played in the second half.
Step-by-step explanation:
The most important variable in this problem is B) The number of minutes Logan played in the second half.
To determine the length of time Logan played during the second half, we need to subtract the time Keith played and the time Wilson played from the total length of the second half. Keith played the first 22 minutes, so we subtract that from 40 minutes to get 18 minutes remaining. Wilson replaced Logan with 18 minutes left in the game, so we subtract 18 minutes from the 18 minutes remaining to get 0 minutes. Therefore, Logan played 18 minutes during the second half.