Let s be the number (in thousands) of Starbucks stores, and let t be the number of

Question:

Let s be the number (in thousands) of Starbucks stores, and let t be the number of years since 2010. There were 21.4 thou- sand Starbucks stores in 2014.
Describe the situation with an ordered pair. Which variable should be described by the horizontal axis of a coordinate system? How about the vertical axis?