if you're good at physics or motion please help meeeee

Look at the speed time graphs below showing how the speed of a swimmer changes as she swims the length of the pool (mps = metres per second)

Which graph represents someone who has swam 50m? Explain how.

if youre good at physics or motion please help meeeee Look at the speed time graphs below showing how the speed of a swimmer changes as she swims the length of class=