Given that a week has 7 days, that makes it an odd number of days.
If Gollum eats fish on alternate days, then he will be able to have fish on alternate Mondays. (i.e. he eats on on one Monday, he will miss the next Monday, then he gets to eat again the following Monday)
Answer: He gets to have fish on alternate Mondays.
You would shift one unit left and one unit up using the formula y=mx+b the b is the y coordinate and the number added or subtracted from the x is the coordinate
