The answer is the third one aka C. 
There must not be two points on the same y-axis because that doesn't make a function but a relation instead.
C. doesn't have 2 points on same y-axis and therefore the third picture is the relation that's a function. 
 
        
             
        
        
        
Answer: He could drive 623.5 miles on a full tank of gasoline 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Step-by-step explanation:
when you lay down and close your eyes
 
        
                    
             
        
        
        
What the formula?
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