Question

Which relationship demonstrates direct variation?

Options

• More workers assigned to job, less time required

• Higher vehicle speed, less travel time for fixed distance

• The greater number of books purchased, higher total amount paid

• More time spent sleeping, less time available for studying

Answer 1

The greater number of books purchased, higher total amount paid

Explanation:

When more books are purchased, the total cost increases in the same ratio. Both quantities increase together proportionally, which is direct variation.