Question

A quadrilateral with vertices at A(4, –4), B(4, –16), C(12, –16), and D(12, –4) has been dilated with a center at the origin. The image of D, point D' has coordinates (36, –12). What is the scale factor of the dilation?
A. 1/9
B. 1/3
C. 3
D. 9

Answer 1

C.3

36/12=3
-12/(-4)=3