Final answer:
In Excel, to create a scattergraph plot, highlight your data and select the "Scatter" option from the Charts group in the Insert tab. This will allow you to visualize the relationship between two sets of quantitative data on a scatter plot.
Step-by-step explanation:
To prepare a scattergraph plot in Excel, highlight the data you want to include in the plot. Then, select the "Scatter" subgroup from the Charts group within the Insert tab. This allows you to plot two sets of quantitative (numerical) items. For more advanced analysis, you may use the calculator's regression function to find the equation of the least-squares regression line and add this to your scatter plot.
Once your scatter plot is created, you can visually analyze the relationship between the data points. Numerous software tools, including computer spreadsheets like Excel, statistical software, and scientific calculators, enable quick calculation of best-fit lines and easy graph creation, rather than doing these calculations by hand.
The importance of the scatter plot lies in its ability to show how two variables are related, which is essential in statistical analysis, including data presentation and interpretation in various science and engineering fields.