Question

The green shape is a dilation of the black shape. The scale factor is _____.

Answer 1

From the graph, we get

The length of a side of the green shape or preimage=4.

The length of the similar side of the black shape or image=20.

Now, the scale factor is,

`Scale\text{ factor=}\frac{\text{length of image}}{\text{length of preimage}}=(20)/(4)=5`

Therefore, the scale factor is 5.