Picture & Bar Graphs
Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories; solve put-together, take-apart, and compare problems using information presented in a bar graph
What a learner can do afterwards
- Draw a picture graph with a symbol representing one unit for each data point
- Draw a bar graph with labelled axes and a single-unit scale
- Use a bar graph to answer comparison questions (e.g. 'How many more votes did cats get than dogs?')
The lesson
You already know how to sort things into groups. A picture graph and a bar graph are two ways to show your groups so anyone can see the counts at a glance. A picture graph uses a small picture for each one. A bar graph uses bars that grow taller as the count grows.
Zara asked her friends which fruit they liked best. Five friends picked apples, so she drew one apple picture for each of them: 5 apples in a row. That is a picture graph, one picture for each vote.
Look at the pet graph again. Cats got 4 votes and dogs got 3 votes. To find how many more, subtract: 4 minus 3 is 1. Cats got 1 more vote than dogs.
When you draw your own bar graph, write numbers evenly up the side, like 0, 1, 2, 3, and label what each bar means. Then anyone can read it without asking you.
A picture graph uses one picture per unit. A bar graph uses labelled bars with an even scale. Read the bars to compare or add up amounts.
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Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.