1. Graphing in Excel X-Y Scatter Plot SCI 110 CCC Skills Training

2. Open Excel & Enter Your Data Into Cells 2. Add titles in the first cell of each column. 4. Add the data in each cell that coordinates with each sample. 3. In the first column, record the sample number, name, or identifier. 1. Open Excel and start an new spreadsheet.

3. Highlight Data & Insert Plot 1. Highlight the data. If two columns are next to each other on the spreadsheet, the data on the left will display on the x-axis. You can select columns that are not next to each other by highlighting the first column, then holding down the ctrl key and highlighting a second column. 2. Click the Insert tab. 3. Click on Scatter to open the dialog box and then choose the graph type you wish to display. You will typically choose the first box, but for some data you may wish to connect the data points (especially if the graph is curved.)

4. The X-Y Scatter Plot Appears 1.Graphs are a visual representation of data. This is your first look at the relationship between x (the independent variable) and y (the dependent variable). 2.You can easily see that both the x and y values are increasing (slope is +), therefore the function is said to be directly proportional. 3.You can also see that it looks like connecting the dots will give a fairly straight line (so this function is said to be linear). 4.You have a few things to do with this graph to prepare it for your report.

5. Add a Trendline 1. Place the cursor on a data point and right click to open the dialog box on the right. 2. Click on Add Trendline to open the next dialog box.

6. Equation of Line & Correlation 1. In this dialog box, make sure linear is selected if the data appears linear. 2. Make sure to select both: Display Equation on chart Display R-squared value on chart. 3. Select close.

7. Displays the Line and R 2 Value 1. A line of best fit now appears across the data points. 2. The equation of the line and the correlation are displayed inside the chart space.

8. Equation of Line In order to talk about a linear relationship, you need to understand what we have just done! Y = 0.0006x – 0.0025 Y = mx + b Where: Y = the y-coordinate in an ordered pair (x,y) m = the slope of the line (0.0006) x = the x-coordinate in an ordered pair (x,y) b = the y-intercept value (-0.0025)

9. Correlation - R 2 The correlation of data is a measure of how close each of your data points are in relationship to each other. A perfect correlation = 1. So on our visual graph, you can see that we have a fairly good linear relationship (because the graph looks like a straight line). The correlation is the mathematical confirmation that the data is linear. R 2 = 0.998 is pretty close to 1, so our data has good correlation.

10. Add Title and Clean Up Graph 1. Click and drag the text block outside of the grid space. 3. Click on the Chart Title tab to open the next dialog box. 2. Open the Layout tab to give the graph a title. 4. Click on the Above Chart option and start typing the title. When finished, hit enter.

11. Add Horizontal (x) – Axis Label 1. The chart title will appear on the graph. 2. Still in Layout, click on the Axis Title tab and select Primary Horizontal Axis Title to open the next dialog box. 3. Select the Title Below Axis option and type the x-axis title then hit enter.

12. Add Vertical (y) – Axis Label 1. The axis title will appear on the graph. 2. Still in Layout, click on the Axis Title tab and select Primary Vertical Axis Title to open the next dialog box. 3. Select the Rotated Title option (which is preferred) and type the y-axis title, then enter.

13. Almost Done - Copy to Word Doc 3. With the graph active, right click anywhere in the white chart area and click copy in the dialog box. 2. The graph is now complete, the only thing you need to do now is copy and paste it into a Word document. 1. You can resize, click and drag the graph to anywhere on the sheet.

14. Paste Into Word for Reports 1. Right click on a page in Word to open the dialog box to paste. 2. Select paste from the dialog box. 3. The graph will appear on the page in Word. Now you are ready to present this graph in your report.

15. You Can Also Copy the Table 1.Highlight the entire table. Note that the area around the table has a dotted line. That lets you know what will be copied. 2.Right click in the highlighted area to open the dialog box. 3. Select copy.

16. Choose a Paste Option for Table 1. Right click in a space you wish to place the table on in Word. This will open the dialog box to paste. 2. Select paste from the dialog box. There are different option, so paste the table presentation you like best. 3. The table will now appear on the page in Word. You can edit the table as you wish. You are ready to present this table in your report.

17. Final Touches 1. Make sure you give your graphs and tables a title and number them in your report so you can refer to each specific one in your discussion. 2. You can resize and move the table and graph freely in your report. You can design fancy tables too!