Misrepresentation:
Misrepresentation is a legal term used to describe a false statement made by one party to another, which induces the other party to enter into a contract. In this case, Y sold goods to X and represented them as being of superior quality when in reality, they are of inferior quality. This constitutes a misrepresentation.

Explanation:
Misrepresentation occurs when one party makes a false statement of fact to another party, and that false statement induces the other party to enter into a contract. In this case, Y falsely represented the goods being sold to X as being of superior quality. X, believing this false statement, entered into the contract and purchased the goods from Y.

False statement:
The key element in misrepresentation is the false statement made by one party to another. Y's statement that the goods were of superior quality was false because they were actually of inferior quality. This false statement induced X to enter into the contract.

Inducement:
Another important element of misrepresentation is that the false statement must have induced the other party to enter into the contract. In this case, X was induced to purchase the goods based on Y's representation that they were of superior quality. If Y had not made this false statement, X may not have entered into the contract or may have negotiated different terms.

Consequences:
When misrepresentation occurs, the innocent party (in this case, X) has certain legal remedies available to them. They can choose to rescind the contract, meaning they can cancel the contract and seek to be restored to the position they were in before the contract was entered into. Alternatively, they may choose to seek damages, which would involve claiming compensation for any losses suffered as a result of the misrepresentation.

Conclusion:
In conclusion, the situation described in the question is a case of misrepresentation. Y made a false statement to X, inducing them to purchase goods that were of inferior quality. X has the right to seek remedies such as rescission or damages to address the consequences of the misrepresentation.