okay so all you are doing is filling out the char to do this you fine the increasing rate or the pattern. so 23=6 53=15 so the pattern is that you are multiplying every input by 3 so 03=0
13=3
33=9
43=12
then to fine the differences you just simply write how much you increased or decreased so every difference for this chart will be +3 hope this helped you have an amazing day!!!!
