Which graph uses vertical bars that touch each other to display frequency distribution?

• A. Histogram
• B. Stem and leaf plot
• C. Line graph
• D. Bar graph

Answer: (A)

A histogram uses vertical bars that touch each other to show a frequency distribution. The bars represent consecutive value ranges (bins), and their heights indicate how many data points fall into each range. The fact that the bars touch signals continuity across the ranges, meaning there aren’t gaps between possible values. This is different from a bar graph, where bars are separated to represent distinct categories. Stem-and-leaf plots and line graphs don’t display frequency distribution with touching vertical bars in the same way; stem-and-leaf shows individual data values arranged by place value, and a line graph connects data points rather than forming a continuous bar chart. So the graph that uses touching vertical bars to display frequency distribution is the histogram.