Question

The number of players of an online game triples each week. The function f(x) = 3^x represents the number of players in week x. When are there 81 players?

Answer 1

Week 4

Explanation:

The function we have is

f(x) = 3ˣ

If there are 81 players, this gives us

81 = 3ˣ

81 = 9(9) = 3(3)(3)(3); this gives us

3(3)(3)(3) = 3ˣ

This means x = 4

Answer 2

The equation to use here is 3^x = 81. You could start to try numbers, and you would realize that x = 4 weeks.