Answer: 10 pages, 36 min. and 490 min.
Explanation: since, function is y=x/2(Given) ,
let x is the minutes taken by the student and y is the pages read by him.
if the teacher recommended that student must be read 20 min each night then the page read by the student is y=20/2=10 pages.
if he read 18 pages then time taken by him is x=2×18=36 min.
if their are 245 pages then the time taken by the student is x=2×245=490 min.
