linear

US /ˈlɪn.i.ɚ/
UK /ˈlɪn.i.ɚ/
"linear" picture
1.

arranged in or extending along a straight or nearly straight line

:
The road follows a linear path through the valley.
The design features a series of linear patterns.
2.

progressing from one stage to the next in a single series of steps; sequential

:
The story has a clear linear narrative.
Learning a new language often involves a linear progression of skills.
3.

involving a single dimension; relating to length

:
The problem can be solved using linear equations.
The graph shows a linear relationship between two variables.