Answer:
top option:
"9/15, 9 to 15, 9:15
or
1/2, 1 to 2, 1:2"
Explanation:
First, create a ratio of white tops to violet tops using the given information:
9 white tops : 18 violet tops
We can simplify this by dividing both sides by 9 to get:
1 white top : 2 violet tops or 1 : 2
So, the answer is the topmost option or
"9/15, 9 to 15, 9:15
or
1/2, 1 to 2, 1:2".
(Note that what this problem calls "forms" just have rewritten operators--for example, the colon can be replaced with a division symbol.)