/sci/ - Science & Math

When I'm asked to find the "Mechanical Resistance" of a material given a stress/strain graph, what the fuck am I being asked to find exactly?
I've literally seen the term referring to any of the main points on the graph, and my brainlet take is that I'm being asked to find the Highest point on the curve (Ultimate Strength), and report what the (nominal) stress at that point is., which is basically the highest stress the material can take before breaking (or literally at break point, for some ceramics)
But I also find some sources referring to the stress at fracture as "Mechanical Resistance" which makes no fucking sense. Also the maximum yield stress (or simply the stress at .2% for continuous lines) but that makes at least a lick of sense.
Which is it then?