Microsoft Excel 2007 can produce a variety of graphs and charts, including scatter plots, line graphs and pie charts. To create a curved graph, you must provide the raw data for the curve, such as a set of x- and y-values in two columns. The first column tells Excel the x-values, or input, and this will be graphed along the horizontal axis. The second column, the y-values, represents the output numbers, which will be graphed along the vertical axis. These values may be collected from a scientific experiment, as part of statistical research or from other fields that collects data.
Input your x-values into the first column, starting at cell A1.
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Input your y-values into the second column, starting at cell B1.
Select "Insert" from the toolbar and choose the "Scatter" button. Choose "Scatter With Smooth Lines" from the drop-down menu.
Select the chart by left clicking on it. Go up to the top toolbar and select "Layout" underneath "Chart Tools." Select "Primary Horizontal Axis" from the "Axes" drop-down menu (press the down arrow beneath "Axes" for the menu). Select "More Options," and change the minimum and maximum x-values by selecting the top two radio buttons. Enter a value that corresponds with your data. For example, if your spread of data is from -10 to 9.1, make your minimum x-value -10 and your maximum y-value 10.
Repeat Step 4 for the "Primary Vertical Axis," entering your y-values in place of the x-values.
Select the graph by placing your cursor on it and left clicking on the mouse. Hit Ctrl C to copy the graph. Hit Ctrl P in Word to paste the graph into the document.
Excel has many built-in functions that can graph various types of curves without you having to input all of the data. For example, the function for the normal distribution is =normdist (x, mean, standard deviation, cumulative).