The graph provides information on changes in the amount of fast food consumption by Australian teenagers.
Overall, from my point of view, the consumption of three types of fast food, like pizza and hamburgers, increased, and fish & chips decreased from 1975 to 2000.
From 1975 to 1980, pizza consumption grew approximately 18%. In the next ten years, from 1980 to 1990, pizza consumption rose almost 47%. In the last ten years, from 1990 to 2000, pizza consumption increased slowly by about 5%.
From 1975 to 1980, hamburger consumption grew approximately 60%. In the next ten years, from 1980 to 1990, hamburger consumption rose almost 30%. In the last ten years, from 1990 to 2000, hamburger consumption was almost constant.
From 1975 to 1980, fish & chips consumption decreased approximately 15%. In the next ten years, from 1980 to 1990, fish & chips consumption went down almost 40%. In the last ten years, from 1990 to 2000, fish & chips consumption was almost constant, minimizing food consumption