Final answer:
To confirm the presence of anti-lock brakes, look for the ABS light on the dashboard upon starting the car and feel for pulsing in the brake pedal during braking in slippery conditions.
Step-by-step explanation:
To confirm whether you are driving a vehicle with anti-lock brakes (ABS), you can't just drive the car at exactly 50 mph and then apply the brakes until it stops to simply record the distance or time it stops. Instead, vehicles equipped with ABS generally have an ABS light on the dashboard that illuminates briefly when the car is started. If the vehicle has an ABS system during actual braking under slippery conditions, you may feel a pulsing in the brake pedal as the system engages to prevent the wheels from locking.
This pulsing is often accompanied by a mechanical noise from the ABS system.