The graph below shows the total number of T-shirt sales, in thousands,
from a custom T-shirt firm, each year from 2001 through 2009.
Number of T-shirts Sold per Year
Number of T-shirts sold (thousands)
4000
3000
2000
1000
0
1 2 3 4 5 6 7 8 9
Years since 2000
Based on the graph, which of the following best describes the general
trend in t-shirt sales from 2001 through 2009?
Sales generally increased each year since 2001.