Arrange the time periods below in chronological order. 1. dark ages 2. middle ages 3. beginning of cristian era 4. fall of roman empire

1. Beginning of Christian Era

2. Fall of the Roman Empire

3. Dark Ages

4. Middle Ages

Explanation:

The Christian Era is the period of time that came after the birth of Christ and the beginning of Christianity. This is usually considered to have been 2019 years ago, and it is the beginning of our calendar. The fall of the Roman Empire came next, around the fifth century CE. The Dark Ages is the time period that followed the fall of the empire, and it receives this name because much of the knowledge and culture of Greece and Rome was forgotten. It also consists of the early years of the Middle Ages, also called the Medieval period.

. a function is a relation in which each input has only one output. in the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. x is not a function of y, because the input y = 3 has multiple outputs: x = 1 and x = 2.