R6 is the default animation rig. R6 means "6 body parts" or "6 joints". Players can enable this body type when customizing their avatar. Game developers can enable whether an avatar uses the R6 rig, R15, and Rthro and its Unlocked Scaling. Despite concerns when R15 was released that R6 would become retired, the Roblox developers announced in multiple blog posts that R6 will always be available ....
the graph above represents the position of two identical carts on a straight horizontal track