A line graph illustrates 'Wolf and Moose population on Isle Royale.' It is plotted between 'Year' on x-axis and 'Number of Wolves' on left y-axis and 'Number of Moose' on right y-axis. The two major trends shown are:

• Red line representing the population of the moose, having maximum (2000) and minimum (400) in the year 1980 and 1994 respectively.
• Blue line representing the population of wolves. having maximum (2400) and minimum (250) in the year 1996 and 2010 respectively.