Question

A triangle with vertices at A(20, -30), B(10.-15), and C(5,-20) has been dilated with a center of dilation at the origin.

The image of B, point B', has the coordinates (2, -3). What is the scale factor of the dilation?
10
o
5
е
10

Answer 1

scale factor =
`(1)/(5)`

Explanation:

Consider the ratio of corresponding coordinates of the image to original, that is

scale factor =
`(2)/(10)` =
`(-3)/(-15)` =
`(1)/(5)`