Question

Rectangle ABCD is the image of rectangle ABCD after which of the following resizings?

• A. Scale factor 2 with central point at the origin
• B. Scale factor 2 with central point (1, 1)
• C. Scale factor 2 with central point (2, 2)
• D. Scale factor with central point (1, 1)

Answer 1

The correct option is B Scale factor 2 with central point (1, 1)

Join A to A, B to B etc. Extend these lines. Where they intersect gives the central point of the resizing, which is (1, 1).
To find the scale factor of the resizing, divide one of the lengths of ABCD by the equivalent length of ABCD e.g. AB/AB = 4/2 = 2, so the scale factor is 2