Question

What is the scale factor of the following dilation? M (5, 10), N (0, 0), P (–15, 20)

M' (1, 2), N' (0, 0), P' (–3, 4)
A. 1/5
B. -1/5
C. 5
D. -5

Answer 1

A. 1/5

All the points are simply divided by 5 to get the answer. If it were -1/5, then the new points would be negative. (Or positive for the points initially negative).