Is it correct if I said this mosfet is very linear with an AC current under 2 amps and 7v Gate-Source? @25c? Is 7v the minimum turn-on threshhold or are there more theoretical lines unshown?
http://www.mouser.com/ds/2/90/3m0120090j-784462.pdf

 

None of the curves looks very linear to me .
The rated typical Vgs turn-on threshold is 2.1V for a 3mA drain current.

 

Well what I mean is, is everything under the 7v line a static 7V turn-on? i.e. linear?