A linear regression model for the net sales data in Table 10 is

S = 15.85t + 250.1

where S is net sales and t is time since 2000 in years.

(A) Draw a scatter plot of the data and a graph of the model on the same axes.
(B) Predict Walmart’s net sales for 2026.

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Table 10 Walmart Stores, Inc. Billions of U.S. Dollars 2008 2011 2012 2015 2009 2010 Net sales 374 401 405 419 444 488 Operating income 21.9 22.8 24.0 25.5 26.6 27.3