1 1 A: The side length and area of a square are not proportional, because they are not two related quantities, and their ratios are different.
Answer: The number of boxes selling apples is directly proportional to the number of kilograms, because they are two related quantities, and their ratio is the same.
A: The number of pages read every day is inversely proportional to the time, because they are two related quantities and the product is the same.
2 1 is proportional, 2 is inversely proportional, and 3 is not proportional.
3 1 A: X and y are proportional, proportional.
2y=8 x=24