Question

which graph is a histogram? three bar graphs labeled spring sports are shown, with different x - axis labels: sport (track, soccer, tennis), grade (3 - 4, 5 - 6, 7 - 8), and school (elementary, middle).

Explanation:

A histogram is a bar - graph that represents the distribution of numerical data. It has no gaps between the bars (since the data is continuous in a sense of intervals).

• In the first graph (with "Track", "Soccer", "Tennis" on the x - axis), the x - axis represents categorical (non - numerical) data (different sports). A histogram is for numerical data, so this is a bar - graph, not a histogram.
• In the second graph (with "3 - 4", "5 - 6", "7 - 8" on the x - axis), the x - axis represents numerical intervals (grade levels can be thought of as numerical intervals). The bars are adjacent (no gaps), which is a characteristic of a histogram.
• In the third graph (with "Elementary", "Middle" on the x - axis), the x - axis represents categorical (non - numerical) data (different types of schools). So, this is a bar - graph, not a histogram.

Answer:

The second graph (with "3 - 4", "5 - 6", "7 - 8" on the x - axis) is a histogram.