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 ...

Microsoft Excel charts give you a large number of options for displaying the data in your spreadsheet. Sometimes, it is useful and informative to plot two different sets of data on the same chart, ...

A date-and-cost line chart tracks a commodity's changing price over time. Economists use such diagrams to display broad market trends and predict future prices. Businesses that restock continually use ...

Excel’s chart features can turn your spreadsheet data into compelling visual communications—if you know what to do. This guide will walk you through the basics of setting up trends, percentages, ...