Question

Scientists are preparing two satellites to be launched. The satellite, Space Explorer A, flies 42000 miles in 7 hours. The graph below represents the number of miles, yy, that the satellite, Space Explorer B, flies in xx hours.
0
Hours
Miles
x
y
0
Hours
Miles
(5,17000)
(10,34000)
Space Explorer B
How much faster does Space Explorer A travel per hour than Space Explorer B?

Answer 1

Space Explorer A: 42,000 miles / 7 hours = 6,000 mi/hr.

Space Explorer B: slope from (5, 17,000) to (10, 34,000) = (34,000 − 17,000) / (10 − 5) = 17,000/5 = 3,400 mi/hr.

Difference: 6,000 − 3,400 = 2,600 mi/hr.

Space Explorer A is 2,600 miles per hour faster.