Question

If a point on the pre-image has coordinates (3, -4), and the coordinates of its image are (12, -16), what scale factor was used for the dilation?


1/4
4
1
-4

Answer 1

3a=12
-4a=-16

Answer 2

I don't understand.

Answer 3

4

Answer 4

3->12 :: 4
-4->-16 :: 4

Answer 5

:] ty

Answer 6

If the pre-image has coordinates (x,y), then the image will have coordinates (kx,ky) where k = scale factor.

In this case, the pre-image has coordinates (3,-4). If the image has coordinates (12,-16), then k = 4 because (4*3, 4*-4) = (12,-16).