Answer:
The bird's average velocity is 4.00 m/s.
Step-by-step explanation:
Given that,
Distance = 5190 km
Time
We need to calculate the bird's average velocity for the return flight
Using formula of average velocity

Where, d = position
t = total time
Put the value into the formula


Negative sign shows the bird is traveling in negative x -axis.
Hence, The bird's average velocity is 4.00 m/s.