Question

When the point (-3,7) is dilated with the center of dilation at the origin, then the image of

the point is (-12.75, 29.75).

What is the scale factor of this dilation?

1) 4
2) 4.25
3) 9.75
4) 10

Answer 1

The answer would be 4.25

Answer 2

4.25

Explanation:

To find the scale factor divide the image coordinates by the original coordinates, that is

scale factor =
`(-12.75)/(-3)` =
`(29.75)/(7)` = 4.25