Question

Take four squares of sides 3.5 4.5 5.5 and 6.5 respectively and verify if their length is directly proportional to perimeter and area

Answer 1

To check if length is directly proportional to to area or perimeter, we need to divide area and perimeter by length. if we get a constant, then it is directly proportional, otherwise not.

See the attachment. It is clear that perimeter is directly proportional to length with proportionality constant 4.