Answer:
Um... they should give you liberty (The dots were confusion)
Explanation:
I hope this helped!
 
        
                    
             
        
        
        
The answer would be "to help you decipher symbols and scale." 
Without the key, a lot of the symbols would be quite confusing and you wouldn't know if it was 5 miles or 500 miles. Everything else is implied throughout the map, but the key's purpose is definitely to help you decipher symbols and scale.
        
                    
             
        
        
        
Answer:
Maybe write about something you like such as a sport or like a place you liked to visit that maybe somone else thought the opposite of your thoughts?
Explanation: