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, ...

Microsoft Excel is a powerful spreadsheet platform used to organize and interpret data. With Excel, you make calculations and analyze statistical data based on columns and rows of information. Excel ...

Real life situations such as travelling over time and across distance can be drawn on a graph. Exact distances and times are plotted on the graph. These are shown as co-ordinates. These points are ...

Forbes contributors publish independent expert analyses and insights. I help people communicate data clearly with graphs. This post is motivated by a comment on my blog post Line Charts Are Not Always ...