The line graph illustrates the frequency with which Australian teenagers consumed three types of fast food—pizza, fish and chips, and hamburgers—between 1975 and 2000. Overall, it is clear that hamburgers and pizza became increasingly popular, whereas fish and chips saw a marked decrease in consumption.
In 1975, fish and chips was the most popular choice, consumed 100 times per year. However, this figure fluctuated, dropping to 85 in 1980 before rising slightly to 95 in 1985. Thereafter, it experienced a steady decline, finishing the period at 38 times per year. Conversely, hamburger consumption started at a low of 10 times per year in 1975 but rose sharply to 85 by 1985. It continued to climb, reaching a plateau of 100 times per year from 1995 onwards.
Pizza consumption followed a similar upward trajectory to hamburgers. Starting at only 5 times per year in 1975, it grew steadily to reach 60 by 1990. By 1995, consumption had risen to 85 times per year, where it remained stable until 2000. By the end of the period, hamburgers and pizza had clearly overtaken fish and chips as the preferred fast food options for Australian teenagers.