Question

Choose the correct scale facto:
2
3
1/2
1/3

Answer 1

Given:

The graph of a figure and its image after dilation.

To find:

The scale factor.

Solution:

From the given graph it is clear that

ND = 3 units

N'D' = 6 units.

We know that,

`\text{Scale factor}=\frac{\text{Side of image}}{\text{Corresponding side of original figure}}`

`\text{Scale factor}=(N'D')/(ND)`

`\text{Scale factor}=(6)/(3)`

`\text{Scale factor}=2`

Therefore, the scale factor is 2 and the correct option is A.