Question

The number of hours needed to complete a trip, h, varies inversely with the driving speed, s. A trip can be completed in 5 hours at a speed of 60 miles per hour. Find the equation that represents this relationship. (this is 'Solve inverse variation problems')

Answer 1

h = 300/s

Explanation:

EX: How many hours would it take to complete the trip at a speed of 75 miles per hour?

Just plug 75 in where s is and solve. 300/75=4

Answer 2

h = 300/s

Explanation:

h and s vary inversely:

h = k/s

When s = 60, h = 5:

5 = k/60

k = 300

h = 300/s