direct variation

16 LETTERS · STARTS WITH D

direct variation is a valid 16-letter word worth 21 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1R1E1C3T1V4A1R1I1A1T1I1O1N1

2 + 1 + 1 + 1 + 3 + 1 + 0 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does direct variation mean?