Answer:
6 degrees.
Step-by-step explanation:
 
        
                    
             
        
        
        
For each answer, we can plug in the given points:
A) is technically the same as B), but B) expresses correct function notation.
B) 5 = 5(1) 
⇒ 5 = 5
     25 = 5(2) ⇒ 25 ≠ 10
     B) is incorrect.
C) I'm not sure what you mean y=5^5=x, but I'm going to use 

 because it's close to what you wrote:

The function 

 works for the points given.
D) 5 = 1 + 5 ⇒ 5 ≠ 6
     D) is not correct.
Please check your functions; I'm not sure that C) is a function.  In any case, the answer is C) because all the other answers are wrong.
 
        
        
        
To find this out, just divide 456, by the answer of 4.56
So once you divide that, you get 100.
So, n=100
CHECK:
456 divided by 100=4.56
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Hope this helped :)
        
                    
             
        
        
        
Additive identity because that is the property when you add something to 0 and get the same thing