Which of the following graphs represents a linear function?

coordinate plane with a graph that passes through the points negative 2 comma 0 and 0 comma negative 2 and 2 comma 0 and 0 comma 2
coordinate plane with a graph drawn that passes through the points negative 1 comma negative 2 and negative 1 comma negative 1 and negative 1 comma 0
coordinate plane with a graph drawn that passes through the points negative 1 comma 4 and 0 comma 1 and 1 comma negative 2
coordinate plane with a graph that passes through the points negative 3 comma 0 and negative 1 comma 4 and 1 comma 4 and 3 comma 0

The third option represents a linear function.