Final answer:
Jim will need to make 4 trips to school to walk a total of 8 kilometers.
Step-by-step explanation:
In order to walk a total of 8 kilometers, Jim will need to make 4 trips to school. Each trip is 2 kilometers, so 2 kilometers x 4 trips = 8 kilometers. Option 1: Jim will need to make 4 trips to school to walk a total of 8 kilometers.