that's a good graph and shows exactly where I pump my tires without ever seeing that graph. I never go to 120 and anything less than 100 is just sluggish. 110 psi is my sweet spot for my weight and tire size and the math behind the chart agrees.

now, of course, when referencing a chart such as this, be sure to factor in true tire size. not all tires are what they are advertised to be (i.e. a 25mm can be a 23mm). Best to measure if you want accuracy.