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,

$\text{Scale factor}=\dfrac{\text{Side of image}}{\text{Corresponding side of original figure}}$

$\text{Scale factor}=\dfrac{N'D'}{ND}$

$\text{Scale factor}=\dfrac{6}{3}$

$\text{Scale factor}=2$

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