The librarian is selling packages of pens and pencils to students. A package of pens cost $1.50 more than a package of pencils. Write the total cost of a package of pens (y) as a function of the cost of a package of pencils (x). A x = y βˆ’ 1.50 B x = y + 1.50 C y = x βˆ’ 1.50 D y = x + 1.50