A company had 17,000 copies of a book to sell in 2012. In 2013, it had 14,000 copies to sell. In 2014, it had 11,000 copies to sell. How many copies do you think the company had to sell in 2015? Explain.
Let’s pretend we are making a table For 2012, 17,000 copies For 2013, 14,000 copies For 2014, 11,000 copies It seems to decrease at a constant rate 17,000-3000 = 14,000 14,000 - 3000 = 11,000 11,000 - 3000 = 9000
