Answer: its A
Step-by-step explanation:
 
        
                    
             
        
        
        
NOT a function ......................... :)
        
             
        
        
        
If it is geometric then
if the terms are a,b,c,d then
b/a=c/b=d/c
so
-54/-81=-36/-54=-24/-36?
2/3=2/3=2/3
and that is the common ratio
it is geomertic and common ratio is 2/3
        
             
        
        
        
0.7/1 of a wall per person