The ordered pair of the origin is (0,0)
        
             
        
        
        
Answer:
Step-by-step explanation:
All real numbers because x can assume every possible value 
 
        
                    
             
        
        
        
Yes, it should be taken into account
        
             
        
        
        
Starts off with 67 people.
Pier two: 67 + 36
                103 - 23 = 80
Pier three: 80 + 18
                  98 - 29 = 69
There will be 69 people on the boat heading for Pier four