Answer:
1. Yes it does. It's a function because it pass in the vertical line test, which tell us that if you can draw an vertical line through the graph and this line touches the graph in only one point, it is a function. 
2. B. I and II only 
3. A. y = 8/7 x +5
 
        
             
        
        
        
Answer:
2x+4
Step-by-step explanation:
 
        
             
        
        
        
8.71428571429 is the answer
        
             
        
        
        
Answer:1.45
Step-by-step explanation:
Divide.