The graph illustrates the time required to produce a refrigerator in three different companies from 1990 to 2000.
Overall, the production time for Companies A, B, and C exhibited a downward trend, with Company C consistently recording the highest figures over the 10-year period. While the production time for Companies A and C fell significantly, Company B showed only a negligible decline.
In 1990, Company C required the longest time to make a fridge, at 35 hours. However, over the decade, this figure experienced a gradual decline, reaching 28 hours in 2000. Similarly, Company A started at 30 hours and converged with Company B at 27 hours in 1995, after which it continued to decrease, finishing at 23 hours in 2000.
Meanwhile, from 1990 to 1995, the production time for Company B remained unchanged at 27 hours. However, from 1995 onwards, it saw a slight drop, reaching 26 hours in 2000.
