The given graph illustrates variation of consumption of different types and amounts of food by Australian teenagers from 1975 to 2000.
Overall, sales of pizza and hamburgers were similar all the way, increasing. However, consumption of fish and chips was totally different from pizza and hamburgers. They were decreasing all the way.
To begin, fish and chips had a big fall by the end. At the beginning in 1975 they had their peak of consumption, 100 times eaten per year, however after they had 1 rapid change before 1985. After it was decreasing all the way before 2000 and reached a minimum, 40 times eaten per year and became the least eaten fast food despite the fact that it was the most consuming product at the beginning.
Pizza and hamburgers were the least eaten products in 1975, however they had a big rise before 1995, 80 times eaten per year. Hamburgers had bigger and earlier increase compared to pizza and it reached 100 times eaten by 2000. It was the most consuming fast food by 2000. Hamburgers in the period of time from 1995 to 2000 had standability at 80 times eaten per year.