1. The bottom of a triangle is fixed, and its height is proportional to its area 2. Judgment questions ① If y = 7x (XY is not 0), then x is proportional to y ② A non-zero natural number is inversely proportional to its reciprocal ③ The height of a cylinder is inversely proportional to its volume ④ The distance is proportional to the speed ⑤ The number of copies of juvenile intelligence development newspaper is in direct proportion to the amount of money used ⑥ The number of attendances is inversely proportional to the number of absentees ⑦ If 2A = 3bab is not equal to 0, then B: a = 2:3 3、 Fill in the blank with the serial number 1. The area of a parallelogram is fixed, and its base and height () In proportion, in inverse proportion, out of proportion 2. Below is () Diameter area circumference ratio 3. The sum and difference of the subtracted () In proportion, in inverse proportion, out of proportion

1. The bottom of a triangle is fixed, and its height is proportional to its area 2. Judgment questions ① If y = 7x (XY is not 0), then x is proportional to y ② A non-zero natural number is inversely proportional to its reciprocal ③ The height of a cylinder is inversely proportional to its volume ④ The distance is proportional to the speed ⑤ The number of copies of juvenile intelligence development newspaper is in direct proportion to the amount of money used ⑥ The number of attendances is inversely proportional to the number of absentees ⑦ If 2A = 3bab is not equal to 0, then B: a = 2:3 3、 Fill in the blank with the serial number 1. The area of a parallelogram is fixed, and its base and height () In proportion, in inverse proportion, out of proportion 2. Below is () Diameter area circumference ratio 3. The sum and difference of the subtracted () In proportion, in inverse proportion, out of proportion

1. In proportion
2. Right, right, wrong, right, right, wrong, right
3、 1. Inverse proportion 2. Diameter 3. Out of proportion