Question

Which of the following situations is an example of direct proportion?
Option 1: The perimeter p of a square and its side length a.
Option 2: The length l and the width w of a rectangle, given the area remain constant.
Option 3: The number of units of a product that can be purchased given a fixed amount of money,and the unit price of the product.
Option 4: The number of rows m and the number of columns n in which a fixed number of marbles can be arranged.

Answer 1

Which of the following situations is an example of direct proportion?

ans - The length l and the width w of a rectangle, given the area remain constant.