Combination or Combined Charts are popular when it is necessary to demonstrate several functions of different nature depending on the same value or values. Those charts use several axes quite often.
This chart has a Column series which might display a discrete function, a Spline-Area series that is great for demonstrating the values of a continuously changing range and a Spline series that shows a value changing in time or in dependence on a value displayed by the X-Axis. There are two Y-Axes, the first one's range of values lays between 0 and 7500 and for the second one this range takes place from 0 to 360. The Spline series uses the secondary Y-Axis. All tooltips show the name of the point and the value the current series demonstrates, as it is set by default. The grid is disabled.