Answer:
21
Step-by-step explanation:
y+9 = ?
y=12
12+9=21
 
        
                    
             
        
        
        
Answer:
1. at 1 hour, 3 miles is the distance.
2. at 0 hours, 0 miles is the distance. 
3. at 3 hours, 9 miles is the distance. 
 
        
             
        
        
        
Answer: x<-8
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Graph 1 is not proportional
Graph 2 is proportional - y is 2 times x
Step-by-step explanation:
In graph 1, there is no x-y correlation
In graph 2, there is, when x=1, y=6 
when x=2, y=12. Therefore, when x=3 y would equal 18.
 
        
             
        
        
        
Answer:
the answer will be something like 18