The line graph shows the number of hours needed to make a refrigerator in three companies in 1990 and 2000.
Overall, all three companies reduced their production time during the period. Company C took the most time in both years, while Company B had the lowest figure.
In 1990, Company C required 35 hours to produce a refrigerator, which was the highest among the three companies. Company A followed with about 30 hours, and Company B took the least time at around 27 hours. By 2000, the time for Company A had fallen significantly to 23 hours.
Company C also saw a decrease, dropping from 35 to 29 hours. In contrast, Company B showed only a small change. Its production time fell slightly from 27 to 26 hours, making it the most stable company over the ten-year period.
