Two related quantities, one of which changes and the other changes, and the product of the corresponding two numbers in these two quantities is certain. These two quantities are called inverse proportional quantities. Their relationship is called inverse relationship. Where k=y*x (sure) x is not equal to 0, and k is not equal to 0. Simply put, if one thing increases, another thing decreases, he decreases, and another thing increases, the relationship between these two things is called inverse ratio.

For example: 1. 100 meter race, the distance is 100 meter, and the speed and time are inversely proportional;

2. Queue for exercises, the total number of people is unchanged, and the number of people in line is inversely proportional to the number of people in each row;

3. Make paper boxes, the total number is certain, the number and number of people per person;

4. When buying things (actually using stationery), the total amount of money is certain, and its unit price is inversely proportional to the quantity;

5. The area of a rectangle is constant, and its length and width are inversely proportional;

6. A cuboid has a certain volume, and its bottom area is inversely proportional to its height.

7. Divide a piece of cake equally, and the cake each person gets is inversely proportional to the number of people.

The total price is fixed, and the unit price is inversely proportional to the quantity.

9. A cuboid has a certain volume, and its bottom area is inversely proportional to its height.

10. The total number of cartons is fixed, and the number made by each person is inversely proportional to the number of people.