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Creating a Simple Scatter Plot and Calculating Slope in Google Spreadsheet For our Ohm’s Law Lab, you should have recorded pairs of data of Voltage (V) and Current (I). When you attempt to create a graph, I recommend that you input the Current data in “Column A”; Google Spreadsheet will use the data in the leftmost column as the xaxis, and we want Current on the xaxis. You can then enter the Voltage data in the next column. Note: the R column is where I will calculate the slope. (My sample data is below.) To create a simple Scatter plot (we want this!) I will highlight the data I wish to graph; I choose to include the labels of I and V as well. Once I’ve highlighted that data, I will Insert a Chart either by selecting the “Insert” tab on the top, or by clicking on the icon that resembles a bar graph: The default graph choice is a Bar graph. To get a Scatter plot, I click on the Charts tab and select Scatter: You will want to click on the small rectangular graph that shows the red and blue circles. You will then click the “Insert” button, which will create your chart. Note: I recommend clicking on the “Customize” tab; this will allow you to give your chart a title (ex: Ohm’s Law Lab, or Voltage vs. Current), as well as label the x and yaxis. Here is my finished chart: Next step: calculating slope. To calculate slope, I will click in the cell labeled “C2” (Column C, Row 2). In this cell, I will instruct the Spreadsheet program to evaluate the Slope function, by typing in: =slope(b2:b11,a2:a11) Note: you must include the = sign, as well as the colons : and the comma. This tells the Spreadsheet program to calculate the slope based on my data that falls in column B, rows 211 (this is my Voltage) and column A, rows 211 (this is my Current). Pressing the “Enter” or “Return” key will finish the calculation. And at this point, you are done with the Spreadsheet! You can then copy and insert the graph into the Calculations and Graphs section of your report.