### 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.

• Consumer Suggestion

The average person takes 10,000 steps per day. That adds up to 115,000 miles over a lifetime. To track your steps, use a pedometer.

If you are interested in adding walking to your fitness routine, visit The Walking Site for tips on getting started.

• 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.

These comments are not screened before publication. Constructive debate about the information on this page is welcome, but personal attacks are not. Please do not post comments that are commercial in nature or that violate copyright. Comments that we regard as obscene, defamatory, or intended to incite violence will be removed. If you find a comment offensive, you may flag it.

``` _    _     ______    _____      ___     _    _
| \  / ||  /_   _//  / ____||   / _ \\  | || | ||
|  \/  ||   -| ||-  / //---`'  / //\ \\ | || | ||
| .  . ||   _| ||_  \ \\___   |  ___  ||| \\_/ ||
|_|\/|_||  /_____//  \_____|| |_||  |_|| \____//
`-`  `-`   `-----`    `----`  `-`   `-`   `---`

```