Year
change since previous
year
+5.5%
2001
-1.9%
2002
2003
+ 1.2%
-0.7%
2004
2005
-0.07%
what is the chart tracking?
a. the value of goods imported from other countries
o
b. economic growth over a certain period of time
o
c. the unemployment rate of workers
o
d. the average amount of income per person
previous

With the few points given, we cannot identify the exact relationship between the year and the corresponding ticket price. In other words, we can not identify the slope. We do know that we are looking at a line graph and that there is a positive association between the two variables.

maybe by travelers or gossip

the answer would be logic.