Question

The point A (10,15) was dilated to become point A’ (4,6). What was the scale factor?

Answer 1

Answer:  0.4

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Explanation:

Preimage = A = (10, 15)

Image = A' = (4, 6)

Divide the x coordinates of the image over preimage

4/10 = 0.4 is the scale factor

Or you could do the same for the y coordinates

6/15 = 0.4