The problem reads: The following graph shows the iPhone sales between the years 2008 and 2012 where t represents the number of years since 2008. The graph can can be described as: the x axis showing the years from 2008 to 2012 (in 1 year increments), and the Y axis labeled 'millions of units sold', starting from 0 to 45 (and in increments of 5). There are two plot points, one at (0, 1.7) and the second at (4, 42). The questions states: Determine the continuous growth model for the iPhone sales. What are the expected sales in the year 2020