ACT Preparation / Unit 15 ACT 1404 short lesson, about 20 seconds
Bar Graphs and Histograms
Captions available
The idea
A bar graph compares categories; a histogram shows how numerical data are distributed, with bars over equal intervals and heights giving counts or frequencies.
In practice
A histogram of test scores with bars for 60–69, 70–79 and 80–89 shows where most scores fall.
Where people slip
Read the axes and the scale before the bars; a scale that starts above zero exaggerates differences.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
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