Representing the regular speed graphically

The video tutorial explains the movement of a car starting from rest, accelerating to 20 km/h, then 40 km/h, before decelerating to 10 km/h and eventually stopping. It illustrates how this movement can be represented graphically, showing the relationship between speed and time.

What is the initial state of the car before it starts moving?

How fast does the car go after the first half minute?

What is the speed of the car after the second half minute?

Describe the change in speed of the car during the second minute.

How can the movement of the car be represented graphically?