Marissa uses this rule to create a pattern. start with the number 108 and subtract 13

is the pattern

Step-by-step explanation:

We have that,

Initial number for the rule, = 108

The next number is obtained by subtracting 13 i.e. = 108 - 13

So, third number is = (108 - 13) - 13 = 108 - 2×13

Then, fourth number is = (108 - 2×13) - 13 = 108 - 3×13

Going on, we get the pattern = .

Hence, using the given rule, we get the pattern to be .

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3