Which statements about the trend line in Item 3 are true? Select all that apply.

A. The slope is the cost of one book.

B. The slope is the cost of Hana's lunch.

C. The y-intercept is the cost of one book.

D. The y-intercept is the cost of Hana's lunch.

x 1 2 2 3 4
y 17 21 23 26 34

When Hana goes to the mall, she always buys the same lunch and also buys some books. The table shows the number of books she buys x and the total amount of money she spends y. Choose the type of correlation that this data shows.