Question

How does the value for A change when r increases?

Answer 1

The area for the a circle is a=pi(r)^2

Answer 2

definitely increases :
longer radius => larger area

Answer 3

Thank you so much!!!

Answer 4

Also notice that, if u increase the area by a factor of \(k\), the Area increases by a factor of \(k^2\)

Answer 5

\(A = \pi r^2\)

Increase the radius by a factor \(k > 1\) :


New area is : \(A_{new} = \pi (kr)^2 = k^2 \bullet \pi r^2 = k^2\bullet A \)