Question

In the diagram shown, JK¯¯¯¯¯¯¯¯is the dilated image of pre-image AB¯¯¯¯¯¯¯¯. What is the scale factor? Graph A. 0.5 B. 2 C. −2 D. 20

Answer 1

To dilate line AB to JK, the coordinates of both endpoints were multiplied by a determined scale factor "k". Following the rule:

`(x,y)\to(kx,ky)`

To determine the scale factor, you have to compare the coordinates of the corresponding points of the image and preimage. So, first step is to determine the coordinates of two corresponding points, for example A and J, from the graph:

A()