Reading and Interpreting Bar Graphs for 4th Grade
A bar graph compares amounts across categories, and the first thing to check is the scale: a graph whose axis does not start at zero exaggerates the differences. The examples below cover reading and building one, with practice problems.
DETAILED EXPLANATION
A bar graph uses bars to show data. The height or length of each bar represents a value. We read and compare bars to answer questions about the data.
WORKED EXAMPLES WITH STEP BY STEP SOLUTIONS
Example 1
In a bar graph, the bar for ‘red’ is 8 units tall and the bar for ‘blue’ is 5 units tall. Which color has more?
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Solutions:
Step 1: Apply the concept from the lesson above.
Step 2: Carry out the operation or reasoning.
Answer: Red has more (8 > 5).
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