Answer:
Slope is -2
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
| -7.8. | = 7.8
Step-by-step explanation:
The symbol for absolute value is two straight lines surrounding the number or expression for which you wish to indicate absolute value.
 
        
             
        
        
        
Answer:
x=40
Step-by-step explanation:
 
        
             
        
        
        
the set of all values that a function will return as outputs 
 
        
             
        
        
        
The answer is A, B(4, 4) and D(4, -3).  
Hope I helped!!!!  :D