Tablet Sales The table lists the actual and projected number N of tablets, such as the iPad, sold worldwide in millions for selected years x.
x | 2011 | 2012 | 2013 | 2014 | 2015 |
N | 90 | 165 | 250 | 340 | 470 |
Source: Business Insider.
(a) Find a linear function N that models the data.
(b) Estimate when this number is expected to be more than 637 million.
(c) Did your estimate involve interpolation or extrapolation?
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