‘X’ is the factor which neither influences equilibrium state nor equilibrium constant. ‘Y’ is the factor which influences both equilibrium state and equilibrium constant. ‘X’ and ‘Y’ are respectively.

catalyst doesn't alter equilibrium state as well as value of equilibrium constant value. Catlyst helps to attains equilibrium quickly. 

For endothermic reactions with increase in tempereature K_eq increases and for exothermic reactions it decreases

Endothermic reactions are favoured for high tempereatures and exothermic reactions are favoured for low temperatures.