50 POINTS I NEED THIS ASAP
On Saturday, the bookstore sold x books. On Sunday, the bookstore sold 3 more books than on Saturday. The expression 2x + 3 represents the total number of books sold over the weekend. What does the "2" represent in the expression 2x + 3?

the total number of books sold

how much more books were sold on Saturday

the number of days

the number of books sold on Saturday