Which graph type shows frequencies as bars that touch each other?

Which graph type shows frequencies as bars that touch each other?

• A. Bar graph
• B. Histogram
• C. Polygon
• D. Line graph

Answer: (B)

Histograms display the distribution of a continuous variable by grouping data into consecutive intervals (bins) and drawing a bar for each interval. The bars touch each other to show that there are no gaps between values, reflecting the seamless sequence of data across the intervals. The height of a bar corresponds to the frequency (or density) of observations in that interval. Bar graphs have gaps between bars because they’re meant to compare separate categories, not show a continuous distribution. Line graphs connect points to illustrate trends over time or ordered categories, rather than frequencies within intervals. A polygon isn’t a standard way to present frequencies in a distribution. So the touching-bar layout points to a histogram.

Histograms display the distribution of a continuous variable by grouping data into consecutive intervals (bins) and drawing a bar for each interval. The bars touch each other to show that there are no gaps between values, reflecting the seamless sequence of data across the intervals. The height of a bar corresponds to the frequency (or density) of observations in that interval.

Bar graphs have gaps between bars because they’re meant to compare separate categories, not show a continuous distribution. Line graphs connect points to illustrate trends over time or ordered categories, rather than frequencies within intervals. A polygon isn’t a standard way to present frequencies in a distribution. So the touching-bar layout points to a histogram.