Answer:
It is geometric
Step-by-step explanation:
Because it is increasing as 6 is being multiplied.
Im not sure but I would seem that the first plan is much better due to the cost. I know this is not an answer but just saying and there just a $0.004 diference wich is practicly the same
5x6= 30
3x3=9
30-9= 21 square meter.