Answer:
3
Step-by-step explanation:
Period of a function is the period after which the function attains the same value 
in the graph attached with this problem we can see that 
f(0)=1
the value of x for which function f(x) attains the value 1 again is at 
x=3
f(3)=1
similarly , we see
f(6)=1 , f(9)=1 
Hence we see that after every increased value of x by 3 units , we attain the same value of function . hence the period of the function is 3 
 
        
             
        
        
        
Answer: 
It's 16 units. Just look at the lengths and how many times they are on a shape. The shape is a rectangle, which means there will be two of each length, so just add them all together. 6+6+2+2=16
 
        
             
        
        
        
1 gallon = $3 so the ratio would be 1:3 where 1 would represent the gallon and 3 the price
        
                    
             
        
        
        
Since <em>x</em> is the number of 14-year periods, the first thing we do is divide 28 years by 14. 28/14=2.  Now we use that in our function, 

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There will be 220 foxes after 28 years.