Ace:
Rob is letting you off easy with respect to the bar chart not startng at zero. Here's why it must start at zero:
Bar Chart Value Axis Scale Must Include Zero
by Jon Peltier
Wednesday, March 30th, 2011
Peltier Technical Services, Inc., Copyright © 2011.
Licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License.
http://peltiertech.com/WordPress/bar-chart-value-axis-scale-must-include-zero/#ixzz1OF1FUIkt.
Remember the cardinal rule about bar charts and axis scales? Because we judge the values in a bar chart by the lengths of the bars, not by the positions of the ends of the bars, the axis scale must include zero. By chopping off the bottoms of the bars, we increase the resolution of the chart, but we distort the apparent values encoded by the bars. I’ll repeat: The value axis of a bar chart must include the value zero.
Bill