How do I do questions 8-10?

Answer:
see explanation
Step-by-step explanation:
Divide the coordinates of the dilation by the original coordinates
(8)
[tex]\frac{6}{9}[/tex] = [tex]\frac{8}{12}[/tex] = [tex]\frac{2}{3}[/tex]
(9)
[tex]\frac{12}{10}[/tex] = [tex]\frac{-8}{-15}[/tex] = [tex]\frac{6}{5}[/tex]
(10)
[tex]\frac{-9}{-1}[/tex] = 9