Respuesta :
Answer:
D. multiply the previous value by 3
Step-by-step explanation:
The pattern of values as the exponents increase is
1/3, 1, 3, 9
Comparing 1/3 to 1, we either add 2/3 or multiply by 3.
Comparing 1 to 3, we either add 2 or multiply by 3.
Comparing 3 to 9, we either add 6 or multiply by 3.
The constant in this pattern is multiplication by 3.