The direction and speed of an object is described by its velocity.

Here's why:

* Speed tells you how fast an object is moving.

* Direction tells you which way the object is moving.

Velocity combines both speed and direction. It's a vector quantity, meaning it has both magnitude (speed) and direction.

For example, saying a car is traveling at 60 mph is describing its speed. But saying the car is traveling at 60 mph north is describing its velocity.