The above line chart illustrates the change in the percentage of households that own three particular electrical appliances from 1920 to 2019, while the below line chart displays the number of hours spent on housework per week in each household across the same time period.
Through observation of the above graph, it is apparent that from 1920 to 2019, all three types of electrical appliances became more common in households, with the percentage of households containing refrigerators increasing from an initial 0% to 100%, 30% to 100% for households containing vacuum cleaners, and 40% to 75% for households containing washing machines.
As for the below graph, a definite decline in the number of hours spent on housework per week can be visualized. Although in 1920, households usually spent around 50 hours on housework weekly, that number radically dropped to 20 hours by 1960, and has continued to steadily deteriorate to just above 10 hours per week in 2019.
By analyzing the trends from both graphs in a more practical manner, it is clear that they complement each other: a rise in the usage of electrical appliances that aid in housework should logically reduce the amount of time spent on housework.