Column Charts are good at demonstrating a discrete value depending on another value of during a period of time. Columns are vertical bars which height matches the value on the Y-Axis and which are distributed by categories held by X-Axis. The third dimension is a visual setting holding no additional information.
This Chart shows changes in a profit of a company from sales in Arizona, Nevada, Texas and Florida. Negative profit is possible when losses overcome revenue; each year there were several regions where the profit was negative. So the Y-Axis range of values is from -$240k to $240k with ticks each $70k. There are only three categories which are placed along the X-Axis, they represent the years from 2001 to 2003. Labels are enabled making it evident how much profit was gained in each region. Tooltips are in single mode, showing the information for the only hovered point. The legend is also enabled so it can be used for understanding the chart better.