Final answer:
A histogram is used to represent the frequency distribution of the number of pets students have, allowing for easy visual interpretation of the data.
Step-by-step explanation:
A histogram would be used for the data from Ms. Multifry's class about the number of pets students have in order to visually represent the frequency distribution of a continuous variable. Since the number of pets students have is numerical data, a histogram allows us to see the distribution in a way that is easy to understand. The number of pets is divided into intervals on the x-axis, and the y-axis represents the frequency of students that fall within each interval. It's an effective way to see patterns, such as which pet ownership ranges are most common, or if there are any outliers, such as students with an unusually high or low number of pets.