Answer:
[tex]A=6l[/tex]
Step-by-step explanation:
The area of a rectangle is
[tex]A= l \times w[/tex]
Where [tex]l[/tex] is length and [tex]w[/tex] is width.
Now, if its width is 6 cm, then
[tex]A=6l[/tex]
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.
