We have a data set which is represented by the following regression line:
[tex]y=7.36x-14354.33[/tex]
With this regression line we can relate sales and years.
Then, if we want to estimate the sales of year 2008, we replace x with 2008 and calculate y:
[tex]\begin{gathered} y=7.36(2008)-14354.33 \\ y=14778.88-14354.33 \\ y=424.55 \end{gathered}[/tex]
As y is expressed in millions, we can calculate the total sales by multiplying this by a million:
[tex]\text{Sales}=424.55\cdot10^6=424,550,000[/tex]
Answer: 424,550,000 [Option d]