Answer:
8
Explanation:
You want the number of books Brody reads each month given that he had read 15 books by his birthday, and 55 books by 5 months after his birthday.
Rate
In the 5 months since Brody's birthday, the graph shows you he has read an additional (55 -15) = 40 books.
As an average rate, that is ...
(40 books)/(5 months) = (40/5) books/month = 8 books/month
Brody reads 8 books each month.
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