What is the common ratio of the following sequence? 9, -27, 81, -243,…

-1
-2
-3
-4

-3

9 x -3 = -27
81 x -3 = -243

solution:

to find common ratio divide any term by its previous term

so, -27/9= -3
or 81/-27= -3
or -243/81 = -3
so, -3

hope it would be helpful

-3