Dennis has a maximum of $80 that he can spend on books. He wants to buy a combination of nonfiction books which cost $12 each and fiction books which cost $8 each. To evaluate his decision, Dennis makes a graph with the number of nonfiction books bought on the x-axis and the number of fiction books
bought on the y-axis. He graphs a linear equation that models the fact that he has $80 to spend.
Which two ordered pairs represent points on the line that Dennis graphs?
(4,5)
(5,4)
(7.2)
(2,7)