Let V 1 and T 1 be a volume-temperature pair of data at the start of an experiment. The new volume-temperature data pair will preserve the value of k. The ChemTeam does not care what the actual value of k is, only that two different volume-temperature data pairs equal the same value and that value is called k. T 2 will be very helpful in solving Charles' Law problems. This graphic simply restates the above in a way HTML cannot do.
Some people remember one better than the other, so both are provided.
The ChemTeam hopes you understand this very well. Now, please don't send me e-mail asking me what I meant by that. Remember that you have to plug into the equation in a very specific way. The temperatures and volumes come in connected pairs and you must put them in the proper place. First of all, 2.20 L is the wrong answer.