Soooo the D pentatonic:
D-E-F#-A-B
....is also the Blues scale of it's Relative Minor: B
B-D-E-F#-A
Never thought of it like that.
Yeah you can think of it that way just add that F to the B Blues scale and you'll have the whole B Blues Scale.. B-D-E-F-F#-A
another example of this Eb pentatonic scale
Eb-F-G-Bb-C
is also the Blues Scale of its relative minor C
Start the Eb pentatonic scale on C and add the #4 and you'll have the C Blues Scale
C-Eb-F-F#-G-Bb-C
That way you can remember two scales in one!