HOW DO WE GRAPH DILATIONS

Dilation - Type of transformation that causes an image to stretch or shrink in proportion to it's original size.

Scale factor- The ratio by which the image stretches or shrinks is known as the scale factor.
                   
                    If the scale factor is >1, then the image is enlarged.
                    If the scale factor is >0 and <1, then the image will shrink.
                 
Multiple the dimensions of the original image by the scale factor to get the dimensions of the dilated image.

What is the scale factor of the dilation (with center at the origin) shown at the left.  

Choose one: 
-2 
2 
1/2 -1/2