Final answer:
A pie chart represents values as percentages of a whole, while a bar chart, scatterplot, and line chart do not.
Step-by-step explanation:
A pie chart represents values as percentages of a whole. It is used to show how an overall total is divided into parts. The slices of the pie chart show the relative sizes of subgroups. For example, if you have a pie chart showing the distribution of grades in a class, each slice of the pie would represent the percentage of students who received each grade.
On the other hand, a bar chart, scatterplot, and line chart do not represent values as percentages of a whole. Instead, they are used to compare and display quantitative data other than percentages. For example, a bar chart could be used to show the sales of different products in a store, with each bar representing the quantity sold.