To solve this problem we will simply use the graph we are given and take a look at the height of the bars that are relevant for the question.
So, to solve the question
Estimate the number of fiction books at coast
we simply take a look at the graph of coast and then take a look at the height of the bar that corresponds to fiction books (the red one).
We can see that it is in between 900 and 1200. So this means that the space between each line represents 300 books. As the height of the bar is about one third of the distance between both lines, we can estimate the number of fiction books at cost as 1000.
Which libraries have more non-fiction books than fiction books?
To solve this question, we simply take a look at the libraries whose non-fiction bars are taller than the fiction ones.
There is only one library that has that, which is Downtown.
Finally,
estimate the total number of books at Woodside.
To solve this, we simply estimate the number of fiction books and the number of non-fiction books and then add those number up.
It seems from the graph that at woodside there are 300 non fiction books and 400 hundred books. So the total number of books would be 300+400=700