Bar Graph: It is used to show a comparison among categories. It may consist of two or more parallel vertical (or horizontal) bars (rectangles). It is a pictorial representation of a grouped data, in the form of vertical or horizontal rectangular bars It is used to compare variables. There are spacing between bars. The lengths of the bars are equivalent to the measure of data, are known as bar graphs or bar charts. Rectangles are drawn on X-axis known as Horizontal Bar Graph. Rectangles drawn along the y-axis are known as Vertical Bar Graphs. Some other terms: Frequency Polygon: It is a graph that is formed by joining the points which are positioned at the mid-point of each interval. Histogram: A histogram is similar to a bar graph in the way that it is also formed using rectangles but the difference is there no gap between these rectangles. Also, it is used to show the distribution of variables Hence, we conclude that the above statement refers to the bar graph.