I encountered a line in my text book of physics that:

Average speed over a finite interval of time is greater or equal to the magnitude of the average velocity.But instantaneous speed at an instant is equal to the magnitude of the instantaneous velocity at that instant.

Now the question is how

instantaneous speed = | instantaneous velocity |

I encountered a line in my text book of physics that:

Average speed over a finite interval of time is greater or equal to the magnitude of the average velocity. But instantaneous speed at an instant is equal to the magnitude of the instantaneous velocity at that instant.

Now the question is how

instantaneous speed = | instantaneous velocity |?