9:7
Ratios are always simplified so by dividing both 18 and 14 by 2 you get 9 and seven. Because yellow triangles is stated first the 9 is put before the 7 blue triangles.
Answer:

Step-by-step explanation:
The x-axis represents
and
is 3. The y-axis represents
and
is -4 so
is -4i.
It is 4 because 3 times 4 equals 12