There could be several reasons for this. First, check your data and make sure it is accurate and entered correctly. Next, check your graph settings and make sure the correct variables are selected for the x and y axes. It is also important to ensure that the data is being plotted correctly, such as using the correct graph type (line, scatter, etc.) for your data. Finally, check for any errors or outliers in your data that may be affecting the overall trend.
To add error bars to your graph, select the data points on your graph and then click on the "Layout" tab. From there, click on "Error Bars" and select the type of error bars you would like to add (standard deviation, standard error, etc.). You can also customize the error bars by clicking on "More Error Bar Options" and adjusting the settings.
If your graph is not scaling properly, try adjusting the minimum and maximum values for each axis. You can do this by right-clicking on the axis and selecting "Format Axis." From there, you can manually enter the minimum and maximum values or choose to have Excel automatically determine the best scale for your data.
Yes, you can change the color, size, and style of your data points by right-clicking on them and selecting "Format Data Series." From there, you can choose from a variety of options to customize the appearance of your data points.
To add a trendline, select your data points on the graph and then click on the "Layout" tab. From there, click on "Trendline" and select the type of trendline you would like to add (linear, exponential, etc.). You can also customize the trendline by right-clicking on it and selecting "Format Trendline."