How To Use Excel Graph To Find Unknown

Can i add an unknown data point to linear graph in excel 2003.

How to use excel graph to find unknown. Note the value of r squared on the graph. Your graph should now look like figure 6. Thanks for helping me. Click the chart elements button. The absorbance is my y value and the concentration is graphed on the x axis.

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. 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. How can i determine the concentration of my sample. Using the r squared coefficient calculation to estimate fit.

In this case you may want to extract the data from this chart. To let your users know which exactly data point is highlighted in your scatter chart you can add a label to it. By default excel shows one numeric value for the label y value in our case. Select the data labels box and choose where to position the label. Now this tutorial is talking about data extracting from a chart or graph.

Is there a way for me to have excel calculate this. Click on the highlighted data point to select it. 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.