Trajectory path as line and not dots

Hey guys, i m working on a 2D platformer in which the player can shoot arrows. I would like to visualize the path, which the arrow will take. All the tutorials regarding this topic use dotted trajectories, but is it possible to use a line, which gets slimmer further down the line ?

 

You could start with the LineRenderer component built into Unity and just fed in the series of computed trajectory points.