Six dollars is the only answer that seems correct using the graph. Hope this helped.
        
                    
             
        
        
        
Your slope of this graph is: 4/3x
        
             
        
        
        
we are supposed to explain
Which situation could be solved using the equation 
As we can see in the given equation , one number is -4 and the other number is 4
When we add two number of same value but opposite in sign we get zero.
This equivalent to the real life situation of paying a post paid bills.
Suppose you are using a post paid service , and the bills gets generated at the end of the month.
Suppose the bills amount is $x.
Once you pay that bills , then total outstanding again becomes $0.
Because 
 
        
             
        
        
        
Answer:
it would be 52 degrees as well because it is a corresponding angle