linear (suomeksi)

lineaarinen (a: in mathematics, of first-degree polynomial / physics: involving only one dimension)
suoraviivainen (a: having the form of a line / of or relating to lines / made in a step-by-step manner)
johdonmukainen (a: made in a step-by-step manner)
tasasoukka (a: botany, of leaves: long and narrow)