Answer:
The equation relating A to B is:
A = 53 + B
This is because Amanda earns $53 each week without selling any books, and earns an additional $1 for each book she sells.
To find the amount of money Amanda earns if she sells 15 books, we simply plug in B = 15 into the equation:
A = 53 + 15
A = 68
Therefore, if Amanda sells 15 books in a week, she will earn $68