Question

if the demand for good'y' increases as the price of another good'x' rises,how are the two goods related?

Answer 1

good x and y are supplementary goods 
supplementary goods are those goods which are perfect substitute of each other so they provide equal level of satisfaction 
they have positive or direct relation i e if demand of 1 good rises then demand for another good will also rise and vice versa

Answer 2

Explanation:

This are complementary goods which can be used in place of one another.

As the price of gud x will increase it will increase the demand of gud y.

hope it will be helpful☺