R; all quadratic functions are going to have ranges and domains of *ALL REAL NUMBERS* [(-∞, ∞)]. 
 
        
             
        
        
        
Answer:
y=2/3x+4
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
-2
Step-by-step explanation:
Each term is being multiplied by -2.
9(-2) → -18
-18(-2) → 36
 
        
             
        
        
        
Answer:
k=27/11
Step-by-step explanation:
 
        
             
        
        
        
 One is colder than the other. 
     Hope this helps :)