Question 1047615
i think you meant:


pre-image:
a = -4,2
b = 4,4
c = -1,2


post-image
a' = -2,1
b' = 2,2
c' = -1/2, 1


this would be a contraction.


the scale factor would be 1/2.


a' = 1/2 * a
b' = 1/2 * b
c' = 1/2 * c


the post image is 1/2 times the dimensions of the pre-image.


the center of the dilation is assumes to be the origin.


here's a reference.


<a href = "http://www.regentsprep.org/regents/math/geometry/gt3/ldilate2.htm" target = "_blank">http://www.regentsprep.org/regents/math/geometry/gt3/ldilate2.htm</a>