Answer:
x=4 is vertical line it's an undefined slope
 
        
             
        
        
        
Answer:
there was a 16% increase since 2010 to 2012
Step-by-step explanation:
lets say the train had 100 people on it in 2010 and in 2011 it had an 8% increase which then brings you to 8 plus 100 and you get 108. 
Now in 2012 there was an increase 8%, so you will add 8 to your previous answer 108 and receive 116. So now there was 16 more passengers in 2012 than in 2010. Transfer the 16 passengers into 16% and you now have your answer.
 
        
             
        
        
        
Answer:
The outlier is $105.
Step-by-step explanation:
An outlier is a value amongst other values that is smaller or bigger than those other values, for example, the $105 in the above equation.