The bar chart illustrates the weekly expenditure of British people on fast foods, while the line chart depicts the number of fast foods consumed between 1970 and 1990 in grammes.
People with average and high incomes prefer to consume expensive hamburgers rather than pizza and fish and chips. They are willing to spend approximately 34 to 40 pence every week for one person. Then, individuals with high salaries prefer to spend more on pizza over fish and chips, which account for just around 18 pence per week. Whereas, individuals with middle incomes tend to buy fish and chips, which cost 25 pence, compared to pizza with a price of about 12 pence per person per week. Lastly, a group of individuals with low incomes love to pay roughly 17 pence on fish and chips weekly over pizza and hamburgers, which cost around 7 and 14 pence respectively.
From 1970 to 1990, fish and chips had different consumption trends compared to hamburgers and pizza. In 1970, fish and chips was the fast food with the highest consumption, making up about 300 grams. However, this figure gradually decreased to about 220 grams in 1990. Different from the fish and chips trend, the consumption of hamburgers and pizza started from nearly 100 grams and around 50 grams respectively. These figures jumped to above 500 grams and 200 grams respectively at the end of the period.
To sum up, hamburgers have become the most expensive fast food for people with high and middle incomes. Moreover, this fast food became popular among people from 1982.