The given line graph illustrates data on participation in four types of physical activities in a certain region between 1985 and 2005. Overall, rugby had the highest number of participants at the beginning, but experienced a steadily drastic decline over time, while tennis saw gradual growth and eventually became the most popular activity by the end of the period. Meanwhile, basketball and badminton followed a similar pattern throughout, with badminton consistently being the least favored option.
Rugby was the most prevalent among the four types of sports, starting at nearly 250 participants in 1985. However, its numbers gradually declined until 1995, dropping by approximately 50, before experiencing a dramatic plunge to just around 50 participants by 2005. Concerning tennis, it became the second most popular activity at the outset at the beginning and showed a consistent upward trend throughout the period, eventually becoming the most dominant sport with around 230 participants. Notably, the number of people playing tennis was identical to that of rugby in 1995.
Regarding badminton and basketball, participation in these two sports followed a relatively similar trend. However, the number of basketball participants exhibited a slight decline at the end of the period, settling at around 70 in 2005. Meanwhile, badminton consistently remained the least preferred sport, beginning with just over 50 participants in 1985 and was approximately 20 fewer than that of basketball participants in 2005, with its participant count matching that of rugby.