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The length L that a spring will stretch varies directly as the force f applied to the spring.
1. What is the equation of the variation, given that is the constant?
2. If a force of 10 pounds will stretch a spring by 2 inches, then what force will stretch the
same spring by 3 inches?
The time to complete a project varies inversely with the number of employees.
3. If 4 people can complete the project in 5 days, then what is the constant k of the
variation?
4. How long will it take 5 people to finish the project?
The number of sorted letters varies directly as the number of working hours.
5. If a mailman can sort out 738 letters in 6 hours, then what is the constant k of the
variation?
6. How many letters can be sorted out in 9 hours?
The number of days needed in repairing a house varies inversely as the number of men
working.
7. What is the equation of the variation, given that is the constant?
8. If it takes 15 days for 2 men to repair the house, then what is the constant of the
variation?
9. How many men are needed to complete the job in 6 days?
