Question

Which of the following quantities are directly proportional?

Is this proportional?

The area of a rectangle and its length, if its width is 6 cm.
Pls help

Answer 1

They are directly proportional.

`A=6l`

Explanation:

The area of a rectangle is

`A= l * w`

Where
`l` is length and
`w` is width.

Now, if its width is 6 cm, then

`A=6l`

Now, this equation states that the area of the rectangle and its length are directly proportional, because if we increase the length, then the area will be also increased. Remember that a direct proportion between two magnitudes is where they both increase or decrease at the same time.

Therefore, they are directly proportional.