Write YES if the two quantities vary directly and NO if they do not. Write your answer on the blank provided. Example: The number of test papers a teacher can check and the number of items in a test = YES
6. The cost per kilogram of rice and the number of kilograms of rice bought
7. The number of mangoes bought and the amount paid for the mangoes
8. The distance traveled by the car and the amount of gas left in the tank
9. The perimeter of a square and its side length
10. The score in a test and the Grade of the subject