Lisa packs some copies of a book in a box for shipping. the equation y = 14x + 9 represents the total weight in ounces of the books and the box if Lisa packs x books. Explain what the slope and y-intercept of the equation represents in this situation. A. The box weighs 14 ounces and each book weighs 9 ounces. B. Lisa packed 14 books and the box weighs 9 ounces. C. Lisa packed 9 books that weigh 14 ounces each. D. The box weighs 9 ounces and each book weighs 14 ounces.