The answer to your problem is 728
I believe the answer is 1 because the line is negative and has a slope of 1/2 so -1/2 and it crosses at 8
The distance from San Francisco to New York is 4140 km. Since the question asks how long it took the Humphrey family in km/hr (kilometers per hour), you would just divide 4140km by 6.
Why? Because it took them 6 hours to make a trip of 4140 km. Dividing 4140 by 6 gives you the distance they traveled per hour.
690 km/hr
Watch yt bro there’s all the answer
