If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to the y-axis intersects with the values in the function’s curve only once. The same ...

Two columns or rows of data in Microsoft Excel may contain useful information, but you'll just have a set of numbers. You can give spreadsheet viewers a graphical representation of those numbers by ...

Plot points with coordinates where \(x\) and \(y\) are equal. Three points are sufficient, but more can be plotted. Draw a line through the plotted points. If \(x\) is positive, \(y\) is negative. If ...

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The legend on an Excel scatter plot is simply a list of the names for each of the series on the chart. The legend is color coordinated, so you can quickly determine which data points belong to which ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Pete Rathburn is a copy editor and ...