Pls help geometry is hard

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

Which is the completely factored from of xy^3-x^3y

Abaseball team drinks 10/4 gallons of water during a game. which mixed number represents the gallons of water consumed? a) 1 1/2 gallons b) 2 1/2 gallons c) 2 3/4 gallons d) 3 1/2 gallons