(Modeling) Solve the problem.
Apple Products The table lists the worldwide average household spending (in dollars) on Apple products for selected years.
Year | 2009 | 2011 | 2013 | 2015 |
Spending ($ dollars) | 62 | 158 | 265 | 444 |
(a) Use regression to find a formula f(x) = ax + b so that f models the data.
(b) Interpret the slope of the graph of y = f(x).
(c) Estimate the average household spending on Apple products in 2014 and compare it with the actual value of $343.
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