You would use bar graph for the following reasons:

• They are easy to make.

• They organize data so information is easily understood.

• They show each bar representing counts for a category .

• They show that the length of the bar represents the percent of the total that falls into that category.

This is how to make a bar graph:

1. Determine if you want to make a horizontal or vertical bar graph.

2. Make two axes:

   In a horizontal bar graph, the horizontal line (the x-axis) represents the individual categories and the vertical line (the y-axis) represents the scale.

   

   In a vertical bar graph, the horizontal line (the x-axis) represents the scale and the vertical line (the y-axis) represents the individual categories.

   

    

3. Be sure that the axes are labeled.

4. Be sure the axes have consistent intervals (that the intervals are all equal).

5. Be sure the graph has a title.