Andy has read 4 chapters in 2 hours. if he continues reading at the same rate how many chapters will he have finished after 5 hours?

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

a is the right answer