To represent the given data, which consists of two sets of numerical values (years and corresponding prices), the most appropriate method is to use a scatterplot. A scatterplot allows you to plot the prices against the years, showing the relationship between the two variables visually.
The other options, such as frequency tables and pie charts, are not suitable for this type of continuous data. Frequency tables are used for categorical data, and pie charts are typically used to show proportions of a whole rather than trends over time.
Therefore, the correct answer is scatterplot.