Hehe, I'm also in grade six. We just learned the positive-negative ratio last week. Let me teach you what our teacher said.
Proportion: if the unit price is fixed, what quantity is fixed, divided by the other two quantities. If the proportions are the same, they are proportional. For example, the unit price of watermelons is fixed, and the number and total amount of watermelons bought, the diameter, circumference and π of the circle are fixed. You'd better make a table, just like a broken line statistical chart, draw it and click it. If it is in a straight line, it is proportional.
Inverse proportion: two quantities are multiplied, and the product is certain. These two quantities are inversely proportional. For example, when the distance is constant, the product of time and speed is equal to the distance, which is the inverse ratio.
Out of proportion: it is neither a business relationship nor a product relationship, or it is out of proportion.
And remember a formula: x times Y=K (for sure) is inversely proportional.
X divided by Y=K is proportional.
You can ask this question, which shows that you love learning. Let's make progress and work together! Give me some advice if you can. If you have QQ, can you give me the QQ number? I will introduce it in more detail)