Which is a feature of dialect?

Linguistic structure

Explanation:

A dialect is chiefly distinguished from other dialects of the same language by features of linguistic structure—i.e., grammar (specifically morphology and syntax) and vocabulary.

Informal language that is used in different cultures, regions or certain groups of people.

Explanation:

It is kind of like how people stereotype Americans from the Southern part of the country say Y'all and Ain't all the time. Or people from my state say yinz to refer to a group of people (Ex. "How are yinz doing?")

a line graph will be best to show the income.