+0  
 
-1
255
1
avatar+1015 

Traingle ABC is transformed with the center of dilation at the origin.  

Pre-image: △ABC with vertices  A(−3, 4), B(−1, 12), C(4, −2)

Image: △A′B′C′ with vertices  A′(−0.6, 0.8),  B′(−0.2, 2.4),  C′(0.8, −0.4)

 

What is the scale factor of the dilation that maps the pre-image to the image?

AngelRay  Nov 17, 2017
 #1
avatar+88898 
+1

All we need to do  to find the scale factor is to take the ratio of the x coordinate of A' to he x coordinate of A

 

So we have

 

-0.6 / - 3  =  .6 / 3  =    (6 /10)  / (3 /1)  =  (6 / 10) * (1/3)  =  6 / 30  = 1/5

 

 

cool cool cool

CPhill  Nov 17, 2017

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