Build a 2 x 2 Scatterplot - Impact / Effort

When you click the "+New" button to add a new report, select the option for a graph.
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Then select Scatter Plot for the report type.
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Once selected it will ask you for the X axis, and the Y and the Series.  
You can have 2 Y axes values by clicking the green plus (+) button when hovering over the y-axis row.
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You will have to tinker with your data points, but if you have the right set up you should be able to get what you are looking for.

You can get your Impact / Effort chart to look like what you expect of such an analysis tool:

Google Image Search: Impact Effort Chart
https://www.google.com/search?q=impact+effort+chart&tbm=isch

This Hichchart can easily be integrated into QuickBase:

http://jsfiddle.net/uk2xs2z7/embedded/result,js,css,html/



JSFiddle
http://jsfiddle.net/uk2xs2z7/embedded/result,js,css,html/