I tend to not trust much Manchester United, meanwhile it should be said that their results are positive lately. At the opposite Luton Town aren't that successful and they collected only 5 points in the last five matches.
Playing at home entered into consideration for bookies for sure, otherwise Luton Town odds could be lower. If Luton Town lose this match then they might switch to the relegation zone since Everton are expected to win against Crystal Palace this Monday.
I actually see Man United winning the match because currently they are playing a little better than Luton Town as a promoted team. Luton Town is also in a positive trend because they have only suffered one defeat in their previous five matches. The match will also take place at their home ground so Man United will not easily get full points even though I tend to see Man United coming out on top.
If Luton Town loses this match then their chances of dropping down the relegation zone are quite open, because Luton Town is only one point away from Everton. So Luton Town have to play better to get points because this is an opportunity for them not to be chased. Moreover, Everton will face Crystal Palace with equally inconsistent playing conditions.