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7.1 Linear Patterns

7.1 Linear Patterns
  • Math Help

    The graph shown in Example 2(a) is called a scatter plot. A scatter plot is very useful in detecting patterns in data. You can use a spreadsheet to create a scatter plot similar to the one in Example 2(a) using the steps below.

    1. Create a spreadsheet like the one shown.
    2. Select cells A2 through A20 and B2 through B20.
    3. From the Insert menu, choose Chart....
    4. Select the Standard Types tab. Under Chart type:, select XY (Scatter). Then click Next.
    5. Click Next again.
    6. Select the Titles tab. Enter "U.S. Men's Shoe Size" for Chart title:, "Foot length (inches)" for Value (X) axis:, and "Shoe size" for Value (Y) axis:.
    7. Select the Legend tab. Uncheck Show legend. Click Finish.

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  • Checkpoint Solution

    The data for this checkpoint is located in the spreadsheet.

    1. Each time the foot length changes by 0.17 inches, the shoe size increases by half a size. So the pattern is linear.
    2. Using the spreadsheet to graph the data, you can see that the points on the graph lie on a line. So the graph is linear.

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    system user
    Ron Larson (author)1 decade ago |
    I have always liked patterns. Understanding a pattern in nature gives me a feeling of comfort.