Https://www.cliffsnotes.com/literature/p/poes-short-stories/summary-and-analysis/the-telltale-heart
This may help you, probably more than me.
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: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
Explanation:
I really liked that one hufflepuff chick with the pink hair
Don’t send a letter, send an email. Don’t close the window, close the door.don’t speak Spanish, speak German. Don’t play football, play basketball. Don’t wear a skirt, wear jeans. Don’t make cookies , make a cake. Don’t be sad, be happy.