​Ratio and Rates Review

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​Equivalent Ratios

​ratios that have different numbers but represent the same relationship (like equivalent fractions.

​Scale Factor

• ​A number that you multiply or divide by to create equivalent ratios.

​Use the table to find equivalent ratios to 3 : 18.

​Using ratio tables

​We can use ratio tables to create and organize equivalent ratios.

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​You can use your scale factor vertically or horizontally to create or fill in the pieces to the table.

​Creating Graphs from Ratios

​1. Create a ratio table using the ratio given in the problem.

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​2. Create ordered pairs from the ratios in the table.

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​3. Plot the points on the graph.

​Solve This (Example 3)

​The ratio of white socks to black socks in Terry's drawer is 4 :5. Create a graph that best represents the relationship between x, the number of white socks and y, the number of black socks.

​How to use a ratio table to predict points not found on the graph?

​Identify the points on the graph not including the origin.

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​Create a ratio table of points found on the graph.

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​Identify the scale factor to determine the missing part of the ratio.