Did you mean to say that ?
Either way, forcing a change to the stem length on one of the end notes will force a slope and modification of the length will get a desired angle with the stem direction in the way that you want it.
!NoteWorthyComposerClip(2.0,Single)
|Note|Dur:32nd|Pos:-11|Opts:Stem=Up,StemLength=11,Beam=First
|Note|Dur:32nd|Pos:n-11|Opts:Stem=Up,Beam
|Note|Dur:32nd|Pos:#-10|Opts:Stem=Up,Beam
|Note|Dur:32nd|Pos:-9|Opts:Stem=Up,Beam
|Text|Text:"9"|Font:PageSmallText|Pos:16|Justify:Right|Placement:AtNextNote
|Note|Dur:32nd|Pos:n-8|Opts:Stem=Up,Beam
|Note|Dur:32nd|Pos:n-7|Opts:Stem=Up,Beam
|Note|Dur:32nd|Pos:n-5|Opts:Stem=Up,Beam
|Note|Dur:32nd|Pos:b-4|Opts:Stem=Up,Beam
|Text|Text:"----------------------------------- \|"|Font:PageSmallText|Pos:15|Justify:Right|Placement:AtNextNote
|Note|Dur:32nd|Pos:n-4|Opts:Stem=Up,Beam=End
|Text|Text:"\|-----------------------------------"|Font:PageSmallText|Pos:15
|Note|Dur:32nd|Pos:#-3|Opts:Stem=Down,Beam=First
|Note|Dur:32nd|Pos:-2|Opts:Stem=Down,Beam
|Note|Dur:32nd|Pos:n-1|Opts:Stem=Down,Beam
|Note|Dur:32nd|Pos:n0|Opts:Stem=Down,Beam
|Text|Text:"9"|Font:PageSmallText|Pos:16|Justify:Right|Placement:AtNextNote
|Note|Dur:32nd|Pos:n2|Opts:Stem=Down,Beam
|Note|Dur:32nd|Pos:b3|Opts:Stem=Down,Beam
|Note|Dur:32nd|Pos:n3|Opts:Stem=Down,Beam
|Note|Dur:32nd|Pos:#4|Opts:Stem=Down,Beam
|Text|Text:"----------------------------------- \|"|Font:PageSmallText|Pos:15|Justify:Right|Placement:AtNextNote
|Note|Dur:32nd|Pos:5|Opts:Stem=Down,Beam=End
!NoteWorthyComposerClip-End