For x = 4, then it means 3 to the fourth power or 3 times 3 times 3 times 3 times 3.  3^4 = 81 and 8 times that is 648.
y(x) = 8 * 3^x where x = 4:
y(x) = 8 * 3^4 = 8 * 81
y(x) = 648
The Function Rule then being that for every value of x there is one and only one value of y. y is the dependent variable and x is the independent variable. 
        
             
        
        
        
Answer:
Total number of boots sold = 48 boots
Step-by-step explanation:
each pair of boot = 2 boots
total pairs of boots sold last month = 24 boots
Total number of boots sold = 48 boots
 
        
                    
             
        
        
        
Answer:
it's just ( -3.3 )but I need to put 20 + words and stuff so read this if you would like
 
        
             
        
        
        
Yeah definitely the first guy
        
             
        
        
        
-3 i think hope it helps:)