Tybalt: This, by his voice, should be a Montague.

Fetch me my rapier, boy. What! dares the slave

Come hither, cover'd with an antick face,

To fleer and scorn at our solemnity?

Now, by the stock and honour of my kin,

To strike him dead I hold it not a sin.

—Romeo and Juliet,
William Shakespeare

How does Tybalt’s relationship with Romeo affect his reaction to Romeo being at the party?

He thinks Romeo is there to insult his family because of the ongoing feud.
He thinks Romeo is there to wear a silly mask and dance because he is an entertainer.
He thinks Romeo is there to work as a servant, because they are not equals.
He thinks Romeo is there to challenge him to a fight because they hate each other.

He thinks Romeo is there to insult his family because of the ongoing feud.