The line graph offers a comprehensive visual overview of household items sold from 1920 to 2019 and the units indicated in percentages. The general trend of the graph is explained as an upward trajectory.
Overall, the graph aims to illustrate fluctuations over the time frame, however, the highest proportion accounted for vacuum cleaners, compared to washing machines which was the lowest.
Considering the washing machine dynamics, the trend significantly surpasses the other appliances, making it the dominant supplier throughout the period. At the beginning of the period, the vacuum cleaner trend initiated from 0 and rapidly surged to 90% by 1960, and in the next two decades the ratio marginally elevated to 100% again this trend levelled up and continued until 2019. Focusing on the washing machine percentage, which accounted for 40% and then it had a marginal upward trend until 1960 to 70%, hereafter, had a slight drop to 60% further levelled up to 70% at the end of the period.
Based on the refrigerator parameters, the percentage commenced from 30% and had a sharp increase to the maximum level of 100% in 2000, then next decade the ratio experienced the same rate at the end of the time frame.