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Key
Idea
A circle graph
shows data and
how parts of data
relate to the total.
Vocabulary
• circle graph
Materials
• blank circles
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Circle
Graphs |
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| How
do you read a circle graph? |
The
graph below is a circle
graph.
It represents all (100%) of
a set of data. The sections,
or wedges, show what part of the whole
each portion of the data represents. |
| The
graph shows that more cheese pizzas were
made than any other kind because the section
for cheese is greater than |
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of the other sections. |
If 100 pizzas were made,
then
you could say that 50
pizzas
with either pepperoni
or
cheese topping were made. |
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Talk About
It |
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| 1.
Which topping was used the least? |
2.
Number Sense Suppose 100
pizzas were made, and
45 were cheese and 35 were mushrooms. How
many
of the 100 pizzas were either sausage or pepperoni? |
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How do
you label a circle graph? |
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The circle graph shows how Sarah
spent one 24-hour period of time from midnight to midnight. She spent
2 hours eating, 10 hours sleeping, 6 hours at school, 2 hours doing
homework, and 4 hours on other activities. |
a.
Copy and label the graph. (Hint:
Think about
which activity took the most
time and which
two activities took the
same amount
of time.) |
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b. How did you know which section of the graph should be
labeled School and which should be labeled Sleeping? |
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