Final answer:
Two connections are required when jump-starting a vehicle using jumper cables.
Step-by-step explanation:
When jump-starting a vehicle using jumper cables, two connections are required.
The first connection is made between the positive terminal of the donor vehicle's battery and the positive terminal of the recipient vehicle's battery.
The second connection is made between the negative terminal of the donor vehicle's battery and a grounding point on the recipient vehicle's engine or chassis.