Is your a plural possessive

The possessive adjective 'your' is placed before a noun to show that the noun belongs to a singular or plural noun or nouns for two or more people. Examples:

singular: Jane, I brought your lunch.

plural: Jane and Jack, your lunch is on the table.

plural: Class, it's time for your lunch now.

singular: Excuse me miss, you left your book on the counter.

plural: Your room looks very nice, girls.