No if it is squared it is a parabola. To be linear it has to be. A straight line
Traditionally used as a thickening agent in lotion, this vegetable derived waxy substance is also used as a hardening agent in soaps (at a .5% of your oils as a usage rate). Stearic acid is also used as a hardening agent in candles, vegetable or paraffin based.
They are all final consumers