b
a and d should not be considered bc it is not logically correct. c is eliminated because that may not always be the case. therefore it should be b.
 
        
             
        
        
        
Answer to the problem is 18x^4
        
                    
             
        
        
        
Answer:
B
Step-by-step explanation:
we can see that the two lines intersect at the point (1,2) 
thus this is the solutions to both lines which is answer B