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

Use synonyms

spent in a

week

Use synonyms

doing housework had decreased steadily

due to

Linking Words

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

year

Use synonyms

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

Use synonyms

1980, almost every household had a refrigerator.

Similarly

Linking Words

, every home had a vacuum cleaner by the

year

Use synonyms

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

Linking Words

continued to increase

further

Linking Words

. In 1920, nearly 50

hours

Use synonyms

of time work was spent on housework every

week

Use synonyms

by an individual household, which significantly declined until the

year

Use synonyms

1960, at 20

hours

Use synonyms

a

week

Use synonyms

with the increase in the use of electrical appliances.

Furthermore

Linking Words

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

hours

Use synonyms

a

week

Use synonyms

by the

year

Use synonyms

2019.