Answer :
Answer:
The value of x will be an interger above or equal to 0. The value of y will be a interger equal or above 0.
Step-by-step explanation:
You can never buy a negative amount of books (x). You can only spend a positive amount of money. So even if she did not buy a book it would be 0, never under it.
Answer: it's the 2nd one
Step-by-step explanation: The value of x can be any real number greater than or equal to 0, and y will be a real number greater than or equal to 0