Question:
The bar graph below shows the number of books borrowed from a library each year from 2010 to 2014.
(a) In which 1-year period was there the biggest change in the number of books borrowed?
(b) In 2013, for every non-fiction book borrowed, 3 fiction books were borrowed.
How many more fiction than non-fiction books were borrowed in 2013?
(Assume that there were only fiction and non-fiction books in the library.)