Graph rules and examples

You have drawn a histogram instead of a bar graph. Otherwise ok, except for the problem about axes not starting at zero, which is debated between scientists and mathematicians.<br />

spaces between bars?!?

I agree with mgowen... Has some use, but some issues mathematically: Line of best fit should be drawn for a scatter graph, not line graph If data is discrete (discontinuous) for a bar graph, there should be an equally spaced gap between bars Bars should be of equal width for simple bar graphs You can draw a bar chart for grouped continuous data - the x axis should have a numerical scale (not labelling each bar), and should touch. For simple bar graphs with continuous data, the class intervals should be equal.

Useful, but Mathematically dubious. The discontinuous data (discrete) shown is a chart, not a graph...that&#39;s the difference between the two. &quot;axes don&#39;t have to start at zero&quot;. Er, yes unless should unless you&#39;re a politician or dodgy newspaper graphic artist...heard of compressing the axes? No wonder Science teachers and Maths teachers think each other teach graphing badly...

Good Resource, I plan to use this as a wall aid to reinforce graph drawing. Thank you for posting.