# What is a Histogram? | Math Review

## Histogram

What we have here is an example of a Histogram. A histogram is very similar to a bar graph. In fact we could say it’s a type of bar graph. It has or it displays continuous numerical data and it’s a way to display data.

It’s a way to visually represent data that you’re dealing with. Right here we have a histogram and we are looking at the number of books read per month by students. We have a Y axis and an X axis like you would in any bar graph.

Right here we have the number of students and then going this way we have the number of books per month. That’s what we have right here, we have the number of students and the number of books per month. I’m just going to go ahead and fill in these bars here.

One difference you may have already noticed between a histogram and a regular bar graph is that these are all squished together, there are no spaces in between them. We see here four different bars and so they’re each representing different amounts of books.

It looks like thirty students read zero to two books a month and forty-five students read two to four books a month. Ten students read four to six books a month and fifteen students read six to eight books per month.

This is a way to represent visually data that we could have just written down on paper. We could have written right here, “thirty students read zero to two books per month.”

By putting it right here in what we call a Histogram, it’s a way to show this continuous numerical data of each amount of books and it’s a way to present it visually so that it’s easier to comprehend.

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by Mometrix Test Preparation | Last Updated: May 15, 2019