The given line graph illustrates the average amount of salary (Yen), and the prices of black and white TVs and color TVs in Japan from 1970 to 2000.
Overall, it is evident that the price of both color TVs and black and white TVs experienced a net decrease, whereas the average income in Japan followed an ascending trajectory. It is also noticeable that the average Japanese salary picked up progressively and ranked first by the end, though initially the least dominant.
Regarding the prices of color TVs and black and white TVs, in 1970, while the latter started at an all-time high of 110, the figure for the former was absent. Afterwards, the price of black and white TVs plunged steadily to reach 40 in 1980. During this, the figure for color TVs initially appeared (at 100). From 1980 to 2000, black and white TVs saw another decline, but at a lower pace, from 40 to 20 by the end. A decline can also be seen in the figure for color TVs, as its figure continued to drop consistently to end at just under 50 in 2000. Despite this constant fall, the price of black and white TVs still fell short of that of color TVs.
Moving on to the Japanese salary, in 1970, the income started at nearly 20 yen, which then increased gradually to approximately 30 yen in 1990. This figure continued to climb, yet at a more sharp pace, to reach its peak of nearly 70 yen by 2000, exceeding the figure for the prices of color TVs and black and white TVs.