Final answer:
A line plot is used to display b) discrete data.
Step-by-step explanation:
A line plot is used to display data that is discrete. Discrete data consists of distinct values or categories that cannot be divided.
For example, if you are measuring the number of pets owned by each student in a class, the data would be discrete because it consists of whole numbers (1, 2, 3, etc.) that cannot be divided into smaller parts.
In contrast, continuous data consists of values that can be divided and measured on a continuous scale, such as height or weight.
Therefore, the best type of data for a line plot is b) Discrete.