Need some assistance understanding the mathematical logic behind this chart/graph.

Brimstone

B3D Shockwave Rider
Veteran
It's from an old role playing game called "Wild West". To figure out your chance of success on percentile dice, you take a ruler from the experience side and run in thru the CV value (Characteristic Value), then the percentage chance is given on either A,B, or C column.

The A scale is if the task is extremely hard.

The B scale is if the task is difficult.

The C scale is if the task is routine.

http://img183.imageshack.us/my.php?image=rpgchartym8.gif


So I'm wondering what is this type of chart/graph called and how it's created?
 
Back
Top