Answer:
5.68
Step-by-step explanation:
it is 5.67812 
I just rounded the answer like is says to
 
        
                    
             
        
        
        
20 pages might take 30 minutes hope that works
        
                    
             
        
        
        
Step-by-step explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one.  
Please have a look at the attached photo.  
My answer: 
Question 1: Please see the answer at the photo, remember that when number of quartz is = 1 , Price per quartz = 2. This will be merge against each other.
This step will be repeated for the remaining figure. 
Question 2: 
As an be seen from the scatter plot, price per quart decrease when the number of quarts increase so the relation between the two variable show a negative association
Hope it will find you well. 
 
        
             
        
        
        
The third one C. Because if you just take a close look at it it make sense