The given graph illustrates the average salary (Yen) earned monthly by Japanese people and the costs of black and white televisions and color televisions between 1970 and 2000. Overall, there was a remarkable increase in average salary, while the figure for 2 types of televisions declined significantly during the research period.
In 1970, Japanese people earned under 20 Yen per month, while a black and white television was priced at 110 Yen, so it is clear that televisions were luxurious products at that time. The average salary rose slightly to about 30 Yen in 1990, showing that Japanese people can afford to buy the black and white television but cannot be affordable to buy the color television because its price was twice more than the figure for salary. Finally, the average salary witnessed a dramatic increase to approximately 70 Yen in 2000, while the prices of 2 different televisions dropped, so that Japanese people can buy the television which they liked.
In contrast, the cost of black and white televisions started at 110 Yen in 1970, then decreased sharply to 40 Yen in the next 10 years, before experiencing a steady decline to about 20 in 2000. There was a noticeable drop in the figure for color televisions, which fell from 100 Yen in 1980 to around 55 Yen in 1990 and them decreased slightly to roughly 47 Yen in the end of the period.