Vertical bar graphs are called __________.

The vertical bar graph is also known as Histogram.

A histogram is the graphical representation of data where data is grouped into continuous number ranges and each range corresponds to a vertical bar.
 

For example:

Uncle Bruno owns a garden with 30 black cherry trees. Each tree is of a different height. The height of the trees (in inches): 61, 63, 64, 66, 68, 69, 71, 71.5, 72, 72.5, 73, 73.5, 74, 74.5, 76, 76.2, 76.5, 77, 77.5, 78, 78.5, 79, 79.2, 80, 81, 82, 83, 84, 85, 87. We can group the data as follows in a frequency distribution table by setting a range:

This data can now be shown using a histogram. We need to ensure that there shouldn’t be any gaps between the bars while plotting a histogram.