Operating income. A linear regression model for the operating income data in Table 1...

Operating income. A linear regression model for the operating income data in Table 11 is

I = 1.66t + 8.80

where I is operating income 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 Wal-Mart's annual operating income for 2018.