To represent the given data, which consists of prices over a series of years, the most appropriate method would be a scatterplot. A scatterplot allows you to visualize the relationship between two numerical variables—in this case, the year (as the x-axis) and the price (as the y-axis). This will help in identifying trends over the years.
The other options, such as pie charts and frequency tables, are not suitable because they do not effectively represent the continuous trend or relationship present in this dataset.