Can you guys please help me with this equation ( only answer if you know the answer )

Answer:
last option is the correct one.
Step-by-step explanation:
if you will multiply each value with 3 it will give you the next one.
Answer:The answer would be multiply the previous number by 3
Step-by-step explanation: That’s the answer because if you multiply 1/3 by 3 you get 1, if you multiply 1 by 3 you get 3, and if you multiply 3 by 3 you get 9