For this discussion consider the table of materials shown below. It compares the density and modulus for several materials. The density is reported in in lbs/in3 modulus (aka, stiffness or E) in 106 lb/in2. Lets create an Ashby style plot. First, create a scatter plot with the density on the x-axis and the modulus on the y-axis. Ensure both axes are labeled correctly and include units. Make annotations and group materials on this plot in a fashion as what you observed for other Ashby diagrams. This will require a quick internet search to get see some examples