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 ...

How Excel Charts Work A chart has an x-axis range and a y-axis range to show the correlation between two different data sets. The x-axis is the horizontal category line.

Excel has two primary types of charts that graph data sets onto an axis: line charts and scatter charts. Depending on your settings, the two types of charts can look identical, but using the wrong one ...

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 ...

Learn how to draw and understand information presented by a line graph with this interactive guide by BBC Bitesize for KS2 pupils.