Read data from a Table Solve a Proportion Make a Circle Graph.

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Presentation transcript:

Read data from a Table Solve a Proportion Make a Circle Graph

To make a circle graph you need to use this proportion:

This is a proportion. It is a mathematical analogy comparing one rate or ratio to another X = the size of the sector or the “slice of pie” 360 degrees in the whole circle

This is a proportion. It is a mathematical analogy comparing one rate or ratio to another % = the percentage 100% is always the whole circle

To make a circle graph use this proportion: degreesColor% Black40 White30 Brown15 Red10 Other5 Shoe Color worn on Friday by OMS Students

Solve the proportion. Take the data from the table & substitute it into the proportion. This will show how much of the circle represents OMS students wearing black shoes. degreesColor% Black40 White30 Brown15 Red10 Other5 Shoe Color worn by OMS Students

Cross multiply and write the equation. Step 1:

Simplify the equation. Use the Division Property of Equality. Step 2: Divide both sides of the equation by the number next to the letter….

Look back and check over Do the cross products check ? Does 144 ∙ 100 = 360 ∙ 40 ?

Look back and check over What does the solution do for us ??? What does it mean???

This is a proportion. It is a mathematical analogy comparing one rate or ratio to another X = the size of the sector or the “slice of the pie” 360 degrees in the whole circle

40% of a circle (360°) is 144°. OR as an analogy “144 is to 360 as 40 is to 100.” degrees 144 Color% Black40 White30 Brown15 Red10 Other5 Shoe Color worn on Friday by OMS Students

10% of a circle (360°) is ?°. OR as an analogy “_____ is to 360 as 10 is to 100.” degrees 144 ??????? Color% Black40 White30 Brown15 Red10 Other5 Shoe Color worn on Friday by OMS Students

Fill in the rest of the table degrees 144 Color% Black40 White30 Brown15 Red10 Other5 Shoe Color worn on Friday by OMS Students