Help!! This is way overdue and i only have a couple more questions on this paper.

Which function is represented by the graph

Miranda is braiding her hair.then she will attach beads to the braid.she wants 1_3 of the beads to be red.if the greatest number of beads that will fit on the braid is 12,what other fractions could represent the part of the beads that are red?

I’m really confused and need your assist me with this question i’ve never been taught