Respuesta :

akephd

The scale factor is the first choice, 5/9.

This is because if you multiply 18 x 5/9, You get 10.

altavistard

Answer:

5/9

Step-by-step explanation:

Ask yourself:  How do you get from 18 to 10?

Multiplying 18 by 5/9 will do the trick:

5             5(2)

---- · 18 = -------- after reducing 18/9

 9               1

This comes out to 10, showing that the correct scale factor is 5/9.