How To Use Excel Graph To Find Unknown

Thanks for helping me.

How to use excel graph to find unknown. Click the chart elements button. Add unknown data point linear graph excel 2003. I have an unknown sample s absorbance and i need to determine the concentration. Can i add an unknown data point to linear graph in excel 2003. Now this tutorial is talking about data extracting from a chart or graph.

Double click on the trendline choose the options tab in the format trendlines dialogue box and check the display r squared value on chart box. I have created a linear scatter graph in excel 2003 with the intent of finding an unknown x value with a known y value. So we had to do a beer s law plot in my chemistry class. Note the value of r squared on the graph. In excel we usually use chart to show data and trend for more clearly viewing but in sometimes maybe the chart is a copy and you haven t the original data of the chart as below screenshot shown.

Click on the highlighted data point to select it. Select the data labels box and choose where to position the label. To let your users know which exactly data point is highlighted in your scatter chart you can add a label to it. We are suppose to use excel to do so. By default excel shows one numeric value for the label y value in our case.

Your graph should now look like figure 6. In this case you may want to extract the data from this chart. Using the r squared coefficient calculation to estimate fit.