Thomas R. answered • 05/03/18
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I assume this is a statistics question...? If so, the data types usually break down -- initially -- into qualitative and quantitative. The former refers to traits with no numerical significance. In other words, it could include gender, eye color, political party, or even zip code (because they are numerical values but do not have real mathematical meaning). The latter is any number that truly works as a number. It breaks into two main subsets: discrete and continuous. Discrete data consists of things you can count in whole units only, like desks, people, Frisbees, and so on. Continuous data is for things that can exist in parts (i.e., fractions or decimals). This group includes things like temperatures, money, et cetera.
In your case, you are counting, so your data is quantitative, and you are counting things that exist on a scale, so it is continuous data.
Now that you know the type, you know that you can use a pie chart or histogram. A bar graph would have been appropriate if you had qualitative data like eye colors (a pie chart would also work for this).