The line graph illustrates the monthly earnings of Japanese (Yen), the costs of black and white TV and color TV between 1970 and 200.
Overall, it can be seen from the graphs that the average wage of Japanese people rose substantially throughout the period, while the opposite trend was true for the prices of two types of TV.
In 1970, the average salary in Japan was 20 Yen, after which it experienced a stable increase to 30 Yen in 1998, before reaching the peak of around 70 Yen in 2000.
By contrast, the price of television generally decrease over the 40-year period. In terms of black and white TV, its cost was 110 Yen, which was the highest, in 1970. After 10 years, it plunged to 40 Yen in 1980 and ended the period at approximately 20 Yen in 2000. The price of color TV started at 100 Yen around 1980, followed by a slightly decline to around 70 Yen in 1982, before witnessing a gradual drop of 20 Yen in the rest of the period.
