The given line graphs illustrate the percentage of households with electrical appliances and the time taken to do housework during the years between 1920 and 2019.

The given line graphs illustrate the percentage of households with electrical appliances and the time taken to do housework during the years between 1920 and 2019. We can infer from the graphs that the number of

hours

spent in a

week

doing housework had decreased steadily

due to

the increased use of electrical appliances in houses had increased dramatically throughout the given timeline. In the

year

1920, none of the houses had a refrigerator, which significantly became popular in 1940 with nearly every second household having one, and by the

year

1980, almost every household had a refrigerator.

Similarly

, every home had a vacuum cleaner by the

year

2000, which earlier in 1920 was at only 30%. 40% of the households at the beginning of the timeline had washing machines, which increased linearly until 1960, with a small drop of nearly 10% during the period between 1960 and 1980, and

subsequently

continued to increase

further

. In 1920, nearly 50

hours

of time work was spent on housework every

week

by an individual household, which significantly declined until the

year

1960, at 20

hours

a

week

with the increase in the use of electrical appliances.

Furthermore

, in the later years, the time spent continued to decrease steadily, which reached a lowest at 10

hours

a

week

by the

year

2019.