How do we graph dilations ?

- A dilation is a type of transformation that causes an image to change its size , either stretching or shrinking of it .The scale factor measures how much larger or smaller the image gets.

Example of dilation : 

 
* HINT : DILATION HAS TO DO WITH MULTIPLYING !


 

-As you can see in the image above EVERY coordinate of the original triangle has been multiplied by the scale factor (x2).

Now You Give It A Try : 

 1. Under a dilation, triangle A(0,0), B(0,4), C(6,0) becomes triangle A'(0,0), B'(0,10), C'(15,0).  What is the scale factor for this dilation?

 Choose one:
2
2.5
4

-2 

GOOD LUCK !!! :)

*images from Google*