How to Do a Two-Sided Graph in Excel. Microsoft Excel can present two series of data points together on the horizontal axis, but if the number scale for each series dramatically differs, the data ...

The graph shows a negative correlation. The vertical scale is going up in increments of 50. Between each multiple of 50 are ten subdivisions. Each subdivision is worth 5 minutes.

Graphs that are not drawn to scale mislead the reader. This post shows another example of a graph where the visual representation of the numbers is not proportional to the numbers themselves.