Why is it useful to look at data in a graph as well as in a table? What is the main advantage of seeing a graph of the data?

For most people looking a long tables of numbers provides little useful insight. The following table is relatively short, but do you quickly see the error in the table?

Time	Sales
1	2,905.061
2	2,105.952
3	2,425.459
4	1,901.989
5	2,983.749
6	2,054.975
7	5,207.734
8	1,549.668
9	2,344.998
10	2,749.116

1. For what kind of data pattern is a linear regression model most applicable? Give an example based on data used in this chapter.