The graph illustrates how the consumption of fast-food in the UK varies across the different types—including hamburger, fish & chips, and pizza—from 1970 to 1990. Overall, the consumed amount of hamburger, as well as, fish & chips had steadily increased, while the expenditure on pizza had declined over the given period.
Hamburger started as the least popular type of fast-food for the residents of Britain, consuming less than 50 of the indicated amounts in the 1970, crawling all the way up to be the second popular with almost reaching 300 in the year of 1990.
Fish & chips started at a considerably higher consumption rate than hamburgers but were still much lower than pizza, at around 90 units in the 1970s. Over the 20-year period, they consistently had a higher consumption rate than hamburgers, experiencing rapid, almost an exponential growth from 1980 to 1990, rising from 150 to a peak of 500.
Pizza was the most popular type of junk food, starting at slightly above 300 units. However, it was the only food item to decline steadily in the first half of the period before experiencing a slight increase later. From 1970 to 1980, its consumption dropped from 305 to 210. Between 1980 and 1990, it remained mostly stable, briefly dropping to 200 in 1985 before recovering to its 1980 level.
In conclusion, increased consumption rate of hamburgers and fish & chips contrasted with reduced consumption rate of pizzas, highlighting the changes in preferences over the given 20-year period.