lob
I'm guessing: lag
Ore is a three letter word and is a mineral that contains metal that is valuable enough to be mined.
The three later word that means view is see.
Two. One for its location on the curve (which, because it is a curve, requires only a single piece of information) and another one for its speed along the curve. Its phase space is thus two-dimensional.
The three characteristics of a supply curve are the slope, shift, and the curve's position. Together they help determine supply and demand trends.
Observe means to see.
A three letter word that could mean clever is sly.
Sly
ilk
apt
din